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-ArraysIntegefied.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:53:06,665 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:53:06,667 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:53:06,679 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-02 11:53:06,711 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 11:53:06,726 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:53:06,727 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:53:06,727 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:53:06,728 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:53:06,728 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:53:06,728 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:53:06,729 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:53:06,729 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:53:06,729 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:53:06,729 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:53:06,730 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:53:06,730 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:53:06,730 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:53:06,730 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:53:06,730 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:53:06,730 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:53:06,731 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:53:06,731 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:53:06,731 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:53:06,731 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:53:06,731 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:53:06,732 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:53:06,732 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:53:06,732 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:53:06,732 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:53:06,732 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:53:06,733 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:53:06,733 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:53:06,733 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:53:06,733 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:53:06,777 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:53:06,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:53:06,795 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:53:06,796 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:53:06,797 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:53:06,798 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl [2018-10-02 11:53:06,798 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-ArraysIntegefied.bpl' [2018-10-02 11:53:06,854 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:53:06,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:53:06,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:53:06,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:53:06,862 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:53:06,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:06" (1/1) ... [2018-10-02 11:53:06,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:06" (1/1) ... [2018-10-02 11:53:06,901 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-02 11:53:06,902 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-02 11:53:06,902 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-02 11:53:06,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:53:06,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:53:06,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:53:06,906 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:53:06,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:06" (1/1) ... [2018-10-02 11:53:06,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:06" (1/1) ... [2018-10-02 11:53:06,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:06" (1/1) ... [2018-10-02 11:53:06,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:06" (1/1) ... [2018-10-02 11:53:06,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:06" (1/1) ... [2018-10-02 11:53:06,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:06" (1/1) ... [2018-10-02 11:53:06,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:06" (1/1) ... [2018-10-02 11:53:06,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:53:06,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:53:06,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:53:06,932 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:53:06,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:06" (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 11:53:06,993 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-02 11:53:06,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-02 11:53:06,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-02 11:53:07,325 INFO L337 CfgBuilder]: Using library mode [2018-10-02 11:53:07,325 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:53:07 BoogieIcfgContainer [2018-10-02 11:53:07,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:53:07,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:53:07,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:53:07,330 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:53:07,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:53:06" (1/2) ... [2018-10-02 11:53:07,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53124772 and model type Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:53:07, skipping insertion in model container [2018-10-02 11:53:07,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:53:07" (2/2) ... [2018-10-02 11:53:07,334 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-ArraysIntegefied.bpl [2018-10-02 11:53:07,343 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:53:07,351 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:53:07,407 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:53:07,408 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:53:07,409 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:53:07,409 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:53:07,409 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:53:07,409 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:53:07,409 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:53:07,409 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:53:07,410 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:53:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-02 11:53:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:53:07,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:07,437 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-02 11:53:07,438 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:07,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:07,445 INFO L82 PathProgramCache]: Analyzing trace with hash 890493448, now seen corresponding path program 1 times [2018-10-02 11:53:07,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:07,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:07,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:07,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:07,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:07,616 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 11:53:07,620 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:53:07,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:53:07,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:53:07,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:53:07,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:53:07,651 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2018-10-02 11:53:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:07,747 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2018-10-02 11:53:07,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:53:07,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-10-02 11:53:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:07,760 INFO L225 Difference]: With dead ends: 22 [2018-10-02 11:53:07,760 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 11:53:07,764 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 11:53:07,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 11:53:07,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 11:53:07,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:53:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-02 11:53:07,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2018-10-02 11:53:07,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:07,802 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-02 11:53:07,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:53:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-02 11:53:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:53:07,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:07,803 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-02 11:53:07,803 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:07,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:07,804 INFO L82 PathProgramCache]: Analyzing trace with hash 892342412, now seen corresponding path program 1 times [2018-10-02 11:53:07,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:07,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:07,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:07,805 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:07,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:07,856 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 11:53:07,857 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:53:07,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:53:07,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:53:07,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:53:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:53:07,860 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 3 states. [2018-10-02 11:53:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:07,869 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 11:53:07,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:53:07,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-10-02 11:53:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:07,870 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:53:07,870 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:53:07,871 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 11:53:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:53:07,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:53:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:53:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 11:53:07,875 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2018-10-02 11:53:07,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:07,875 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 11:53:07,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:53:07,875 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 11:53:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:53:07,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:07,876 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:07,876 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:07,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:07,877 INFO L82 PathProgramCache]: Analyzing trace with hash -391235530, now seen corresponding path program 1 times [2018-10-02 11:53:07,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:07,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:07,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:07,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:07,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:07,946 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 11:53:07,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:07,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:07,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:07,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:07,999 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 11:53:08,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:08,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 11:53:08,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:53:08,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:53:08,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:53:08,031 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-10-02 11:53:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:08,100 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 11:53:08,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:53:08,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-02 11:53:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:08,102 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:53:08,102 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:53:08,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 11:53:08,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:53:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 11:53:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:53:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 11:53:08,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2018-10-02 11:53:08,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:08,107 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 11:53:08,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:53:08,107 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 11:53:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:53:08,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:08,108 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:08,109 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:08,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:08,109 INFO L82 PathProgramCache]: Analyzing trace with hash -602113312, now seen corresponding path program 2 times [2018-10-02 11:53:08,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:08,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:08,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:08,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:08,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:08,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:08,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:08,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:08,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:08,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:08,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:08,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:08,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:53:08,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:53:08,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:53:08,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:53:08,367 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2018-10-02 11:53:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:08,394 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 11:53:08,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:53:08,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-10-02 11:53:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:08,395 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:53:08,395 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:53:08,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 11:53:08,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:53:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 11:53:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:53:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 11:53:08,402 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 14 [2018-10-02 11:53:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:08,402 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 11:53:08,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:53:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 11:53:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:53:08,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:08,404 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:08,404 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:08,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:08,404 INFO L82 PathProgramCache]: Analyzing trace with hash 334846090, now seen corresponding path program 3 times [2018-10-02 11:53:08,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:08,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:08,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:08,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:08,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:08,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:08,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-02 11:53:08,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:08,625 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-02 11:53:08,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:08,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:08,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:08,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:53:08,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:53:08,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:53:08,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:53:08,660 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2018-10-02 11:53:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:08,733 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 11:53:08,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:53:08,734 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-10-02 11:53:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:08,735 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:53:08,735 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:53:08,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 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 11:53:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:53:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 11:53:08,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:53:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 11:53:08,739 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2018-10-02 11:53:08,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:08,740 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 11:53:08,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:53:08,741 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 11:53:08,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:53:08,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:08,742 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:08,742 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:08,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:08,743 INFO L82 PathProgramCache]: Analyzing trace with hash -747417292, now seen corresponding path program 4 times [2018-10-02 11:53:08,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:08,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:08,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:08,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:08,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:08,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:08,916 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 11:53:08,933 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:08,971 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:08,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:08,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:09,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:09,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:53:09,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:53:09,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:53:09,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:53:09,017 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 7 states. [2018-10-02 11:53:09,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:09,045 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 11:53:09,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:53:09,048 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-10-02 11:53:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:09,049 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:53:09,049 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:53:09,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 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 11:53:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:53:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 11:53:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:53:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 11:53:09,053 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 22 [2018-10-02 11:53:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:09,054 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 11:53:09,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:53:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 11:53:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:53:09,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:09,055 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:09,056 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:09,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:09,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1016128734, now seen corresponding path program 5 times [2018-10-02 11:53:09,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:09,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:09,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:09,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:09,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:09,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:09,247 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 11:53:09,255 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:09,271 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 11:53:09,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:09,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:09,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:09,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:53:09,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:53:09,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:53:09,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:53:09,312 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2018-10-02 11:53:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:09,423 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 11:53:09,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:53:09,423 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-02 11:53:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:09,424 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:53:09,425 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:53:09,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 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 11:53:09,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:53:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 11:53:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:53:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 11:53:09,430 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2018-10-02 11:53:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:09,431 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 11:53:09,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:53:09,431 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 11:53:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:53:09,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:09,432 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:09,432 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:09,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash -267873400, now seen corresponding path program 6 times [2018-10-02 11:53:09,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:09,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:09,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:09,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:09,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:09,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:09,556 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 11:53:09,564 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:09,578 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:53:09,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:09,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:09,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:09,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:53:09,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:53:09,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:53:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:53:09,620 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 9 states. [2018-10-02 11:53:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:09,645 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 11:53:09,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:53:09,645 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-10-02 11:53:09,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:09,646 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:53:09,646 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:53:09,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 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 11:53:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:53:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 11:53:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:53:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 11:53:09,651 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 30 [2018-10-02 11:53:09,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:09,652 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 11:53:09,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:53:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 11:53:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:53:09,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:09,653 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:09,653 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:09,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:09,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1386947278, now seen corresponding path program 7 times [2018-10-02 11:53:09,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:09,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:09,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:09,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:09,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:10,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:10,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:10,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:10,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:10,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:10,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:53:10,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:53:10,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:53:10,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:53:10,194 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 10 states. [2018-10-02 11:53:10,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:10,236 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 11:53:10,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:53:10,237 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-10-02 11:53:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:10,238 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:53:10,238 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:53:10,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 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 11:53:10,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:53:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 11:53:10,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:53:10,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 11:53:10,243 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 34 [2018-10-02 11:53:10,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:10,243 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 11:53:10,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:53:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 11:53:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:53:10,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:10,245 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:10,245 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:10,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:10,245 INFO L82 PathProgramCache]: Analyzing trace with hash -223329828, now seen corresponding path program 8 times [2018-10-02 11:53:10,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:10,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:10,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:10,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:10,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:10,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:10,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:10,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:10,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:10,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:10,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:10,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:10,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:53:10,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:53:10,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:53:10,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:53:10,446 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 11 states. [2018-10-02 11:53:10,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:10,487 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 11:53:10,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:53:10,489 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-10-02 11:53:10,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:10,490 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:53:10,490 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:53:10,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 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 11:53:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:53:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 11:53:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:53:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 11:53:10,495 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 38 [2018-10-02 11:53:10,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:10,496 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 11:53:10,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:53:10,496 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 11:53:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:53:10,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:10,497 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:10,498 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:10,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:10,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1659551354, now seen corresponding path program 9 times [2018-10-02 11:53:10,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:10,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:10,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:10,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:10,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:10,849 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:10,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:10,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:10,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:10,896 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-02 11:53:10,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:10,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:10,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:10,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 11:53:10,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:53:10,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:53:10,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:53:10,949 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 12 states. [2018-10-02 11:53:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:11,226 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 11:53:11,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:53:11,228 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-10-02 11:53:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:11,229 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:53:11,229 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:53:11,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:53:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:53:11,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:53:11,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:53:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-02 11:53:11,237 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 42 [2018-10-02 11:53:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:11,237 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-02 11:53:11,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:53:11,238 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-02 11:53:11,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:53:11,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:11,239 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:11,244 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:11,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:11,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2009179088, now seen corresponding path program 10 times [2018-10-02 11:53:11,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:11,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:11,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:11,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:11,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:11,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:11,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:11,544 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:11,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:11,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:11,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:11,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 11:53:11,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:53:11,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:53:11,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:53:11,590 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 13 states. [2018-10-02 11:53:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:11,651 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 11:53:11,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:53:11,655 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-10-02 11:53:11,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:11,656 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:53:11,656 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:53:11,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:53:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:53:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 11:53:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:53:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-02 11:53:11,661 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 46 [2018-10-02 11:53:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:11,661 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-02 11:53:11,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:53:11,662 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-02 11:53:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:53:11,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:11,663 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:11,663 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:11,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:11,663 INFO L82 PathProgramCache]: Analyzing trace with hash 782635482, now seen corresponding path program 11 times [2018-10-02 11:53:11,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:11,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:11,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:11,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:11,845 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:11,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:11,853 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:11,872 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-02 11:53:11,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:11,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:11,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:11,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:53:11,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:53:11,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:53:11,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:53:11,914 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 14 states. [2018-10-02 11:53:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:11,952 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 11:53:11,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:53:11,953 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-10-02 11:53:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:11,954 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:53:11,954 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:53:11,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:53:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:53:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 11:53:11,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:53:11,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-02 11:53:11,961 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2018-10-02 11:53:11,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:11,962 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-02 11:53:11,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:53:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-02 11:53:11,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:53:11,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:11,963 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:11,963 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:11,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:11,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1233576580, now seen corresponding path program 12 times [2018-10-02 11:53:11,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:11,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:11,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:11,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:12,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:12,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:12,159 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:12,346 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:53:12,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:12,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:12,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:12,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 11:53:12,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:53:12,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:53:12,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:53:12,403 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 15 states. [2018-10-02 11:53:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:12,499 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 11:53:12,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:53:12,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-10-02 11:53:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:12,500 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:53:12,500 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:53:12,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:53:12,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:53:12,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 11:53:12,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:53:12,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-02 11:53:12,506 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 54 [2018-10-02 11:53:12,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:12,506 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-02 11:53:12,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:53:12,507 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-02 11:53:12,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:53:12,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:12,508 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:12,508 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:12,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:12,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1893420590, now seen corresponding path program 13 times [2018-10-02 11:53:12,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:12,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:12,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:12,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:12,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:12,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:12,779 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 11:53:12,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:12,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:12,848 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:12,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:53:12,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:53:12,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:53:12,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:53:12,850 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 16 states. [2018-10-02 11:53:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:12,914 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 11:53:12,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:53:12,914 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-10-02 11:53:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:12,915 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:53:12,915 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:53:12,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:53:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:53:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-02 11:53:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:53:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-02 11:53:12,920 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 58 [2018-10-02 11:53:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:12,921 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-02 11:53:12,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:53:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-02 11:53:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:53:12,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:12,922 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:12,922 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:12,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:12,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1151478568, now seen corresponding path program 14 times [2018-10-02 11:53:12,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:12,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:12,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:12,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:12,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:13,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:13,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:13,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:13,145 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:13,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:13,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:13,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:13,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 11:53:13,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:53:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:53:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:53:13,189 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 17 states. [2018-10-02 11:53:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:13,241 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 11:53:13,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:53:13,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-10-02 11:53:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:13,242 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:53:13,242 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:53:13,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:53:13,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:53:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 11:53:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:53:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-02 11:53:13,249 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 62 [2018-10-02 11:53:13,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:13,249 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-02 11:53:13,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:53:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-02 11:53:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:53:13,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:13,252 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:13,252 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:13,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1586034306, now seen corresponding path program 15 times [2018-10-02 11:53:13,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:13,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:13,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:13,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:13,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:13,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:13,464 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 11:53:13,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:13,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-02 11:53:13,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:13,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:13,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:13,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 11:53:13,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:53:13,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:53:13,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:53:13,539 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 18 states. [2018-10-02 11:53:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:13,569 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 11:53:13,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:53:13,570 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-10-02 11:53:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:13,571 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:53:13,571 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:53:13,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:53:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:53:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-02 11:53:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 11:53:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-02 11:53:13,578 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 66 [2018-10-02 11:53:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:13,578 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-02 11:53:13,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:53:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-02 11:53:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:53:13,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:13,580 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:13,580 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:13,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1318531884, now seen corresponding path program 16 times [2018-10-02 11:53:13,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:13,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:13,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:13,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:13,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:13,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:13,957 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 11:53:13,964 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:13,982 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:13,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:13,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:14,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:14,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 11:53:14,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:53:14,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:53:14,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:53:14,024 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 19 states. [2018-10-02 11:53:14,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:14,252 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 11:53:14,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:53:14,252 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-10-02 11:53:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:14,253 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:53:14,254 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 11:53:14,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:53:14,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 11:53:14,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-02 11:53:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 11:53:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-02 11:53:14,262 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 70 [2018-10-02 11:53:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:14,265 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-02 11:53:14,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:53:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-02 11:53:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:53:14,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:14,267 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:14,267 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:14,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:14,268 INFO L82 PathProgramCache]: Analyzing trace with hash -561837354, now seen corresponding path program 17 times [2018-10-02 11:53:14,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:14,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:14,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:14,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:14,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:15,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:15,202 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 11:53:15,209 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:15,285 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-02 11:53:15,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:15,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:15,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:15,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:53:15,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:53:15,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:53:15,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:53:15,339 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 20 states. [2018-10-02 11:53:15,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:15,428 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-02 11:53:15,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:53:15,428 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-10-02 11:53:15,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:15,429 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:53:15,429 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 11:53:15,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:53:15,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 11:53:15,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-02 11:53:15,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:53:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-02 11:53:15,442 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2018-10-02 11:53:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:15,442 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-02 11:53:15,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:53:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-02 11:53:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:53:15,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:15,444 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:15,444 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:15,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:15,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1611070848, now seen corresponding path program 18 times [2018-10-02 11:53:15,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:15,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:15,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:15,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:15,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:15,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:15,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:15,704 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:15,730 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:53:15,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:15,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:15,774 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:15,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-02 11:53:15,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:53:15,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:53:15,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:53:15,775 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 21 states. [2018-10-02 11:53:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:15,824 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-02 11:53:15,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:53:15,824 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-10-02 11:53:15,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:15,825 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:53:15,825 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:53:15,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:53:15,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:53:15,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-02 11:53:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 11:53:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-02 11:53:15,830 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 78 [2018-10-02 11:53:15,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:15,831 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-02 11:53:15,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:53:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-02 11:53:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 11:53:15,832 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:15,832 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:15,832 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:15,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:15,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1013085398, now seen corresponding path program 19 times [2018-10-02 11:53:15,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:15,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:15,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:15,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:15,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:16,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:16,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:16,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:16,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:16,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:16,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:53:16,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:53:16,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:53:16,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:53:16,166 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 22 states. [2018-10-02 11:53:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:16,274 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-02 11:53:16,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:53:16,274 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-10-02 11:53:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:16,275 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:53:16,275 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 11:53:16,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:53:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 11:53:16,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-02 11:53:16,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 11:53:16,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-02 11:53:16,279 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 82 [2018-10-02 11:53:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:16,279 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-02 11:53:16,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:53:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-02 11:53:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:53:16,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:16,284 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:16,284 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:16,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:16,284 INFO L82 PathProgramCache]: Analyzing trace with hash 947991508, now seen corresponding path program 20 times [2018-10-02 11:53:16,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:16,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:16,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:16,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:16,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:16,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:16,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:16,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:16,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:16,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:16,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:16,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:16,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 11:53:16,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:53:16,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:53:16,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:53:16,658 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 23 states. [2018-10-02 11:53:16,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:16,782 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-02 11:53:16,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:53:16,785 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-10-02 11:53:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:16,786 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:53:16,786 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 11:53:16,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:53:16,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 11:53:16,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-02 11:53:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:53:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-02 11:53:16,790 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 86 [2018-10-02 11:53:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:16,790 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-02 11:53:16,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:53:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-02 11:53:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:53:16,792 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:16,792 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:16,792 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:16,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:16,792 INFO L82 PathProgramCache]: Analyzing trace with hash -861112450, now seen corresponding path program 21 times [2018-10-02 11:53:16,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:16,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:16,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:16,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:16,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:17,512 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:17,513 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:17,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:17,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-02 11:53:17,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:17,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:17,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:17,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 11:53:17,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:53:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:53:17,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:53:17,609 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 24 states. [2018-10-02 11:53:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:17,994 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-02 11:53:17,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:53:17,995 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-10-02 11:53:17,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:17,996 INFO L225 Difference]: With dead ends: 97 [2018-10-02 11:53:17,996 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:53:17,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:53:17,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:53:17,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-02 11:53:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 11:53:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-02 11:53:17,999 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 90 [2018-10-02 11:53:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:18,000 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-02 11:53:18,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:53:18,000 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-02 11:53:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 11:53:18,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:18,001 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:18,001 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:18,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:18,001 INFO L82 PathProgramCache]: Analyzing trace with hash 215602728, now seen corresponding path program 22 times [2018-10-02 11:53:18,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:18,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:18,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:18,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:18,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:18,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:18,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:19,001 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:19,021 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:19,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:19,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:19,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:19,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-02 11:53:19,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:53:19,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:53:19,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:53:19,075 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 25 states. [2018-10-02 11:53:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:19,164 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-02 11:53:19,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:53:19,165 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-10-02 11:53:19,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:19,166 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:53:19,166 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 11:53:19,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:53:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 11:53:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-02 11:53:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 11:53:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-02 11:53:19,169 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 94 [2018-10-02 11:53:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:19,170 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-02 11:53:19,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:53:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-02 11:53:19,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:53:19,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:19,171 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:19,171 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:19,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:19,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1534865454, now seen corresponding path program 23 times [2018-10-02 11:53:19,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:19,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:19,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:19,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:19,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:19,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:19,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:19,600 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:19,632 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-02 11:53:19,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:19,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:19,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:19,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:53:19,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:53:19,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:53:19,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:53:19,675 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 26 states. [2018-10-02 11:53:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:19,712 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-02 11:53:19,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:53:19,714 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-10-02 11:53:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:19,715 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:53:19,715 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:53:19,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:53:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:53:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-02 11:53:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 11:53:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-02 11:53:19,718 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 98 [2018-10-02 11:53:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:19,718 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-02 11:53:19,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:53:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-02 11:53:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 11:53:19,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:19,719 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:19,719 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:19,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:19,720 INFO L82 PathProgramCache]: Analyzing trace with hash -35330948, now seen corresponding path program 24 times [2018-10-02 11:53:19,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:19,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:19,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:19,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:19,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:20,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:20,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:20,449 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:20,476 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:53:20,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:20,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:20,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:20,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-02 11:53:20,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:53:20,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:53:20,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:53:20,533 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 27 states. [2018-10-02 11:53:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:20,641 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-02 11:53:20,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:53:20,642 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-10-02 11:53:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:20,643 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:53:20,643 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 11:53:20,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:53:20,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 11:53:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-02 11:53:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 11:53:20,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-02 11:53:20,647 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 102 [2018-10-02 11:53:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:20,647 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-02 11:53:20,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:53:20,647 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-02 11:53:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 11:53:20,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:20,648 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:20,648 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:20,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash -503868378, now seen corresponding path program 25 times [2018-10-02 11:53:20,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:20,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:20,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:20,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:20,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:20,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:21,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:21,228 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 11:53:21,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:21,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:21,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:21,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:53:21,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:53:21,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:53:21,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:53:21,298 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 28 states. [2018-10-02 11:53:21,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:21,347 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-02 11:53:21,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:53:21,347 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-10-02 11:53:21,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:21,349 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:53:21,349 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 11:53:21,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:53:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 11:53:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-02 11:53:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 11:53:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-02 11:53:21,353 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 106 [2018-10-02 11:53:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:21,353 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-02 11:53:21,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:53:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-02 11:53:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 11:53:21,354 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:21,354 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:21,355 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:21,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:21,355 INFO L82 PathProgramCache]: Analyzing trace with hash 410410704, now seen corresponding path program 26 times [2018-10-02 11:53:21,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:21,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:21,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:21,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:21,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:22,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:22,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:22,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:22,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:22,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:22,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:22,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:22,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 11:53:22,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:53:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:53:22,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:53:22,109 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 29 states. [2018-10-02 11:53:22,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:22,286 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-02 11:53:22,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:53:22,287 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-10-02 11:53:22,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:22,288 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:53:22,288 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 11:53:22,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:53:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 11:53:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-02 11:53:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 11:53:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-02 11:53:22,292 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 110 [2018-10-02 11:53:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:22,293 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-02 11:53:22,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:53:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-02 11:53:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 11:53:22,293 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:22,293 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:22,294 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:22,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:22,294 INFO L82 PathProgramCache]: Analyzing trace with hash 131843194, now seen corresponding path program 27 times [2018-10-02 11:53:22,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:22,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:22,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:22,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:22,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:23,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:23,356 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 11:53:23,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:23,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-02 11:53:23,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:23,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:23,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:23,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 11:53:23,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:53:23,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:53:23,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:53:23,449 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 30 states. [2018-10-02 11:53:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:23,500 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-02 11:53:23,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:53:23,500 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-10-02 11:53:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:23,502 INFO L225 Difference]: With dead ends: 121 [2018-10-02 11:53:23,502 INFO L226 Difference]: Without dead ends: 119 [2018-10-02 11:53:23,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:53:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-02 11:53:23,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-02 11:53:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-02 11:53:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-02 11:53:23,506 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 114 [2018-10-02 11:53:23,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:23,507 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-02 11:53:23,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:53:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-02 11:53:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-02 11:53:23,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:23,508 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:23,508 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:23,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:23,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1432503588, now seen corresponding path program 28 times [2018-10-02 11:53:23,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:23,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:23,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:23,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:23,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:23,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:23,966 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 11:53:23,976 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:23,999 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:23,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:24,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:24,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:24,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 11:53:24,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:53:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:53:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:53:24,056 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 31 states. [2018-10-02 11:53:24,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:24,154 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-02 11:53:24,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:53:24,155 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-10-02 11:53:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:24,156 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:53:24,156 INFO L226 Difference]: Without dead ends: 123 [2018-10-02 11:53:24,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:53:24,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-02 11:53:24,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-02 11:53:24,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-02 11:53:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-02 11:53:24,162 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 118 [2018-10-02 11:53:24,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:24,162 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-02 11:53:24,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:53:24,162 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-02 11:53:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-02 11:53:24,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:24,163 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:24,163 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:24,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:24,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2063310642, now seen corresponding path program 29 times [2018-10-02 11:53:24,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:24,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:24,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:24,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:24,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:24,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:24,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:24,644 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:24,676 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-02 11:53:24,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:24,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:24,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:24,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:53:24,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:53:24,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:53:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:53:24,722 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 32 states. [2018-10-02 11:53:24,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:24,829 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-02 11:53:24,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:53:24,830 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-10-02 11:53:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:24,831 INFO L225 Difference]: With dead ends: 129 [2018-10-02 11:53:24,831 INFO L226 Difference]: Without dead ends: 127 [2018-10-02 11:53:24,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:53:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-02 11:53:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-02 11:53:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-02 11:53:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-02 11:53:24,835 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 122 [2018-10-02 11:53:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:24,836 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-02 11:53:24,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:53:24,836 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-02 11:53:24,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-02 11:53:24,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:24,836 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:24,837 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:24,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1719888008, now seen corresponding path program 30 times [2018-10-02 11:53:24,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:24,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:24,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:24,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:24,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:25,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:25,384 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 11:53:25,392 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:25,436 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 11:53:25,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:25,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:25,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:25,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-02 11:53:25,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:53:25,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:53:25,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:53:25,480 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 33 states. [2018-10-02 11:53:25,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:25,572 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-02 11:53:25,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:53:25,573 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-10-02 11:53:25,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:25,573 INFO L225 Difference]: With dead ends: 133 [2018-10-02 11:53:25,574 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 11:53:25,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:53:25,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 11:53:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-02 11:53:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-02 11:53:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-02 11:53:25,577 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 126 [2018-10-02 11:53:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:25,577 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-02 11:53:25,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:53:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-02 11:53:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-02 11:53:25,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:25,578 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:25,579 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:25,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:25,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1270519518, now seen corresponding path program 31 times [2018-10-02 11:53:25,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:25,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:25,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:25,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:25,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:26,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:26,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:53:26,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:26,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:26,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:26,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:53:26,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:53:26,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:53:26,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:53:26,224 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 34 states. [2018-10-02 11:53:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:26,291 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-02 11:53:26,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:53:26,291 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-10-02 11:53:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:26,293 INFO L225 Difference]: With dead ends: 137 [2018-10-02 11:53:26,293 INFO L226 Difference]: Without dead ends: 135 [2018-10-02 11:53:26,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:53:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-02 11:53:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-02 11:53:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-02 11:53:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-02 11:53:26,298 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 130 [2018-10-02 11:53:26,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:26,298 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-02 11:53:26,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:53:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-02 11:53:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-02 11:53:26,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:26,300 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:26,300 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:26,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:26,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1248242228, now seen corresponding path program 32 times [2018-10-02 11:53:26,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:26,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:26,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:26,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:26,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:26,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:26,874 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 11:53:26,880 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:26,907 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:26,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:26,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:26,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:26,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 11:53:26,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:53:26,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:53:26,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:53:26,959 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 35 states. [2018-10-02 11:53:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:27,062 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-02 11:53:27,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:53:27,062 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-10-02 11:53:27,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:27,063 INFO L225 Difference]: With dead ends: 141 [2018-10-02 11:53:27,063 INFO L226 Difference]: Without dead ends: 139 [2018-10-02 11:53:27,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:53:27,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-02 11:53:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-02 11:53:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-02 11:53:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-02 11:53:27,067 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 134 [2018-10-02 11:53:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:27,067 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-02 11:53:27,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:53:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-02 11:53:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-02 11:53:27,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:27,068 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:27,068 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:27,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:27,069 INFO L82 PathProgramCache]: Analyzing trace with hash -596451978, now seen corresponding path program 33 times [2018-10-02 11:53:27,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:27,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:27,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:27,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:27,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:27,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:27,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:27,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:27,829 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-02 11:53:27,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:27,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:27,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:27,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 11:53:27,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:53:27,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:53:27,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:53:27,882 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 36 states. [2018-10-02 11:53:27,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:27,979 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-02 11:53:27,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:53:27,979 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-10-02 11:53:27,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:27,981 INFO L225 Difference]: With dead ends: 145 [2018-10-02 11:53:27,981 INFO L226 Difference]: Without dead ends: 143 [2018-10-02 11:53:27,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:53:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-02 11:53:27,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-02 11:53:27,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-02 11:53:27,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-02 11:53:27,984 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 138 [2018-10-02 11:53:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:27,984 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-02 11:53:27,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:53:27,985 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-02 11:53:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-02 11:53:27,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:27,985 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:27,986 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:27,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:27,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1720483872, now seen corresponding path program 34 times [2018-10-02 11:53:27,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:27,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:27,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:27,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:27,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:29,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:29,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:29,355 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:29,381 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:29,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:29,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:29,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:29,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 11:53:29,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:53:29,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:53:29,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:53:29,442 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 37 states. [2018-10-02 11:53:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:29,518 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-02 11:53:29,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:53:29,519 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-10-02 11:53:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:29,520 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:53:29,520 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 11:53:29,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:53:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 11:53:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-02 11:53:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-02 11:53:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-02 11:53:29,524 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 142 [2018-10-02 11:53:29,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:29,525 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-02 11:53:29,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:53:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-02 11:53:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-02 11:53:29,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:29,526 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:29,526 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:29,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:29,526 INFO L82 PathProgramCache]: Analyzing trace with hash 811646410, now seen corresponding path program 35 times [2018-10-02 11:53:29,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:29,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:29,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:29,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:29,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:30,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:30,133 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 11:53:30,142 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:30,185 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-02 11:53:30,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:30,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:30,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:30,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:53:30,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:53:30,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:53:30,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:53:30,237 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 38 states. [2018-10-02 11:53:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:30,736 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-02 11:53:30,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:53:30,736 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-10-02 11:53:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:30,737 INFO L225 Difference]: With dead ends: 153 [2018-10-02 11:53:30,738 INFO L226 Difference]: Without dead ends: 151 [2018-10-02 11:53:30,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:53:30,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-02 11:53:30,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-02 11:53:30,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-02 11:53:30,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-02 11:53:30,743 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 146 [2018-10-02 11:53:30,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:30,743 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-02 11:53:30,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:53:30,744 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-02 11:53:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-02 11:53:30,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:30,747 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:30,747 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:30,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1428821620, now seen corresponding path program 36 times [2018-10-02 11:53:30,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:30,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:30,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:30,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:30,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:31,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:31,483 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 11:53:31,491 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:31,535 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 11:53:31,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:31,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:31,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:31,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-02 11:53:31,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:53:31,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:53:31,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:53:31,603 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 39 states. [2018-10-02 11:53:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:31,722 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-02 11:53:31,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:53:31,722 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-10-02 11:53:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:31,724 INFO L225 Difference]: With dead ends: 157 [2018-10-02 11:53:31,724 INFO L226 Difference]: Without dead ends: 155 [2018-10-02 11:53:31,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:53:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-02 11:53:31,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-02 11:53:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-02 11:53:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-02 11:53:31,730 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 150 [2018-10-02 11:53:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:31,730 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-02 11:53:31,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:53:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-02 11:53:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-02 11:53:31,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:31,731 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:31,732 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:31,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:31,732 INFO L82 PathProgramCache]: Analyzing trace with hash -823981538, now seen corresponding path program 37 times [2018-10-02 11:53:31,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:31,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:31,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:31,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:31,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:33,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:33,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:33,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:33,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:33,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:33,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:53:33,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:53:33,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:53:33,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:53:33,641 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 40 states. [2018-10-02 11:53:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:34,592 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-02 11:53:34,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:53:34,593 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-10-02 11:53:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:34,594 INFO L225 Difference]: With dead ends: 161 [2018-10-02 11:53:34,594 INFO L226 Difference]: Without dead ends: 159 [2018-10-02 11:53:34,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:53:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-02 11:53:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-02 11:53:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-02 11:53:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-02 11:53:34,598 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 154 [2018-10-02 11:53:34,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:34,598 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-02 11:53:34,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:53:34,598 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-02 11:53:34,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-02 11:53:34,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:34,599 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:34,599 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:34,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:34,600 INFO L82 PathProgramCache]: Analyzing trace with hash 373692616, now seen corresponding path program 38 times [2018-10-02 11:53:34,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:34,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:34,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:34,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:34,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:35,779 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:35,779 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 11:53:35,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:35,829 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:35,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:35,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:35,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:35,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 11:53:35,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:53:35,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:53:35,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:53:35,901 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 41 states. [2018-10-02 11:53:36,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:36,863 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-02 11:53:36,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:53:36,863 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-10-02 11:53:36,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:36,865 INFO L225 Difference]: With dead ends: 165 [2018-10-02 11:53:36,865 INFO L226 Difference]: Without dead ends: 163 [2018-10-02 11:53:36,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:53:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-02 11:53:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-02 11:53:36,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-02 11:53:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-02 11:53:36,874 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 158 [2018-10-02 11:53:36,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:36,875 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-02 11:53:36,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:53:36,875 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-02 11:53:36,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-02 11:53:36,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:36,876 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:36,876 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:36,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:36,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1026702734, now seen corresponding path program 39 times [2018-10-02 11:53:36,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:36,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:36,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:36,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:36,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:38,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:38,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:38,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:38,390 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-02 11:53:38,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:38,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:38,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:38,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 11:53:38,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:53:38,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:53:38,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:53:38,471 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 42 states. [2018-10-02 11:53:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:38,549 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-02 11:53:38,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:53:38,549 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-10-02 11:53:38,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:38,551 INFO L225 Difference]: With dead ends: 169 [2018-10-02 11:53:38,551 INFO L226 Difference]: Without dead ends: 167 [2018-10-02 11:53:38,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:53:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-02 11:53:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-02 11:53:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-02 11:53:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-02 11:53:38,555 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 162 [2018-10-02 11:53:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:38,556 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-02 11:53:38,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:53:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-02 11:53:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-02 11:53:38,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:38,557 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:38,557 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:38,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash 716474140, now seen corresponding path program 40 times [2018-10-02 11:53:38,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:38,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:38,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:38,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:38,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:39,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:39,677 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 11:53:39,684 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:39,732 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:39,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:39,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:39,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:39,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 11:53:39,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:53:39,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:53:39,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:53:39,784 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 43 states. [2018-10-02 11:53:39,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:39,900 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-02 11:53:39,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:53:39,901 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-10-02 11:53:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:39,902 INFO L225 Difference]: With dead ends: 173 [2018-10-02 11:53:39,903 INFO L226 Difference]: Without dead ends: 171 [2018-10-02 11:53:39,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:53:39,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-02 11:53:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-02 11:53:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-02 11:53:39,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-02 11:53:39,906 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 166 [2018-10-02 11:53:39,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:39,907 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-02 11:53:39,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:53:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-02 11:53:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-02 11:53:39,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:39,908 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:39,908 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:39,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash 49604294, now seen corresponding path program 41 times [2018-10-02 11:53:39,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:39,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:39,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:39,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:39,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:40,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:40,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:40,659 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:40,719 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-02 11:53:40,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:40,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:40,786 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:40,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:53:40,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:53:40,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:53:40,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:53:40,787 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 44 states. [2018-10-02 11:53:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:41,196 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-02 11:53:41,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:53:41,196 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-10-02 11:53:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:41,197 INFO L225 Difference]: With dead ends: 177 [2018-10-02 11:53:41,197 INFO L226 Difference]: Without dead ends: 175 [2018-10-02 11:53:41,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:53:41,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-02 11:53:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-02 11:53:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-02 11:53:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-02 11:53:41,201 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 170 [2018-10-02 11:53:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:41,201 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-02 11:53:41,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:53:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-02 11:53:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-02 11:53:41,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:41,203 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:41,203 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:41,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:41,203 INFO L82 PathProgramCache]: Analyzing trace with hash -11968144, now seen corresponding path program 42 times [2018-10-02 11:53:41,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:41,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:41,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:41,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:41,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:42,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:42,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:42,483 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:42,541 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 11:53:42,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:42,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:42,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:42,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-02 11:53:42,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:53:42,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:53:42,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:53:42,616 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 45 states. [2018-10-02 11:53:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:42,738 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-02 11:53:42,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:53:42,738 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-10-02 11:53:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:42,740 INFO L225 Difference]: With dead ends: 181 [2018-10-02 11:53:42,740 INFO L226 Difference]: Without dead ends: 179 [2018-10-02 11:53:42,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:53:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-02 11:53:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-02 11:53:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-02 11:53:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-02 11:53:42,746 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 174 [2018-10-02 11:53:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:42,746 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-02 11:53:42,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:53:42,746 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-02 11:53:42,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-02 11:53:42,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:42,747 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:42,747 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:42,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:42,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1915516698, now seen corresponding path program 43 times [2018-10-02 11:53:42,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:42,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:42,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:42,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:42,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:43,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:43,921 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 11:53:43,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:43,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:44,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:44,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:53:44,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:53:44,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:53:44,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:53:44,021 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 46 states. [2018-10-02 11:53:44,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:44,270 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-02 11:53:44,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:53:44,271 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-10-02 11:53:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:44,272 INFO L225 Difference]: With dead ends: 185 [2018-10-02 11:53:44,272 INFO L226 Difference]: Without dead ends: 183 [2018-10-02 11:53:44,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:53:44,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-02 11:53:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-02 11:53:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-02 11:53:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-02 11:53:44,277 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 178 [2018-10-02 11:53:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:44,278 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-02 11:53:44,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:53:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-02 11:53:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-02 11:53:44,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:44,279 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:44,279 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:44,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:44,280 INFO L82 PathProgramCache]: Analyzing trace with hash -321345596, now seen corresponding path program 44 times [2018-10-02 11:53:44,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:44,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:44,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:44,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:44,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:45,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:45,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:45,207 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:45,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:45,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:45,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:45,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:45,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 11:53:45,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:53:45,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:53:45,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:53:45,295 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 47 states. [2018-10-02 11:53:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:45,377 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-02 11:53:45,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:53:45,378 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-10-02 11:53:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:45,379 INFO L225 Difference]: With dead ends: 189 [2018-10-02 11:53:45,379 INFO L226 Difference]: Without dead ends: 187 [2018-10-02 11:53:45,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:53:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-02 11:53:45,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-02 11:53:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-02 11:53:45,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-02 11:53:45,383 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 182 [2018-10-02 11:53:45,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:45,384 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-02 11:53:45,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:53:45,384 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-02 11:53:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-02 11:53:45,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:45,385 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:45,385 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:45,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:45,385 INFO L82 PathProgramCache]: Analyzing trace with hash -548899986, now seen corresponding path program 45 times [2018-10-02 11:53:45,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:45,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:45,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:45,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:45,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:46,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:46,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:46,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:46,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-02 11:53:46,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:46,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:46,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:46,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:53:46,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:53:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:53:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:53:46,428 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 48 states. [2018-10-02 11:53:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:46,555 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-02 11:53:46,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:53:46,556 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-10-02 11:53:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:46,557 INFO L225 Difference]: With dead ends: 193 [2018-10-02 11:53:46,558 INFO L226 Difference]: Without dead ends: 191 [2018-10-02 11:53:46,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:53:46,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-02 11:53:46,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-02 11:53:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-02 11:53:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-02 11:53:46,562 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 186 [2018-10-02 11:53:46,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:46,562 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-02 11:53:46,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:53:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-02 11:53:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-02 11:53:46,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:46,564 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:46,564 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:46,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash 943086104, now seen corresponding path program 46 times [2018-10-02 11:53:46,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:46,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:46,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:46,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:46,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:48,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:48,126 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 11:53:48,133 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:48,172 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:48,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:48,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:48,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:48,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-02 11:53:48,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:53:48,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:53:48,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:53:48,261 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 49 states. [2018-10-02 11:53:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:48,424 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-02 11:53:48,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:53:48,424 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-10-02 11:53:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:48,425 INFO L225 Difference]: With dead ends: 197 [2018-10-02 11:53:48,425 INFO L226 Difference]: Without dead ends: 195 [2018-10-02 11:53:48,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:53:48,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-02 11:53:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-02 11:53:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-02 11:53:48,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-02 11:53:48,428 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 190 [2018-10-02 11:53:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:48,429 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-02 11:53:48,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:53:48,429 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-02 11:53:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-02 11:53:48,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:48,430 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:48,430 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:48,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:48,431 INFO L82 PathProgramCache]: Analyzing trace with hash 85777346, now seen corresponding path program 47 times [2018-10-02 11:53:48,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:48,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:48,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:48,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:48,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:49,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:49,656 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:49,715 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-02 11:53:49,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:49,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:49,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:49,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:53:49,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:53:49,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:53:49,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:53:49,796 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 50 states. [2018-10-02 11:53:49,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:49,942 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-02 11:53:49,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:53:49,943 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-10-02 11:53:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:49,944 INFO L225 Difference]: With dead ends: 201 [2018-10-02 11:53:49,944 INFO L226 Difference]: Without dead ends: 199 [2018-10-02 11:53:49,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:53:49,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-02 11:53:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-02 11:53:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-02 11:53:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-02 11:53:49,949 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 194 [2018-10-02 11:53:49,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:49,949 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-02 11:53:49,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:53:49,949 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-02 11:53:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-02 11:53:49,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:49,951 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:49,951 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:49,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:49,951 INFO L82 PathProgramCache]: Analyzing trace with hash 305559660, now seen corresponding path program 48 times [2018-10-02 11:53:49,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:49,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:49,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:49,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:51,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:51,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:51,078 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:53:51,139 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 11:53:51,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:51,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:51,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:51,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-02 11:53:51,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:53:51,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:53:51,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:53:51,205 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 51 states. [2018-10-02 11:53:51,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:51,330 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-02 11:53:51,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:53:51,331 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-10-02 11:53:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:51,332 INFO L225 Difference]: With dead ends: 205 [2018-10-02 11:53:51,332 INFO L226 Difference]: Without dead ends: 203 [2018-10-02 11:53:51,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:53:51,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-02 11:53:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-02 11:53:51,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-02 11:53:51,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-02 11:53:51,336 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 198 [2018-10-02 11:53:51,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:51,336 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-02 11:53:51,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:53:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-02 11:53:51,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-02 11:53:51,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:51,337 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:51,337 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:51,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:51,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1971474410, now seen corresponding path program 49 times [2018-10-02 11:53:51,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:51,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:51,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:51,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:51,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:52,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:52,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:52,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:52,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:52,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:52,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:53:52,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:53:52,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:53:52,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:53:52,433 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 52 states. [2018-10-02 11:53:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:52,604 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-10-02 11:53:52,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:53:52,604 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 202 [2018-10-02 11:53:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:52,606 INFO L225 Difference]: With dead ends: 209 [2018-10-02 11:53:52,606 INFO L226 Difference]: Without dead ends: 207 [2018-10-02 11:53:52,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:53:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-02 11:53:52,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-02 11:53:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-02 11:53:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-10-02 11:53:52,610 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 202 [2018-10-02 11:53:52,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:52,610 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-10-02 11:53:52,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:53:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-10-02 11:53:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-02 11:53:52,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:52,612 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:52,612 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:52,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:52,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1750269248, now seen corresponding path program 50 times [2018-10-02 11:53:52,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:52,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:52,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:52,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:53:52,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:54,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:54,044 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 11:53:54,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:53:54,101 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:53:54,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:54,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:54,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:54,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 11:53:54,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:53:54,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:53:54,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:53:54,199 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 53 states. [2018-10-02 11:53:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:54,513 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-10-02 11:53:54,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:53:54,514 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 206 [2018-10-02 11:53:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:54,515 INFO L225 Difference]: With dead ends: 213 [2018-10-02 11:53:54,516 INFO L226 Difference]: Without dead ends: 211 [2018-10-02 11:53:54,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:53:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-02 11:53:54,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-02 11:53:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-02 11:53:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-10-02 11:53:54,520 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 206 [2018-10-02 11:53:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:54,520 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-10-02 11:53:54,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:53:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-10-02 11:53:54,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-02 11:53:54,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:54,522 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:54,522 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:54,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash 37679210, now seen corresponding path program 51 times [2018-10-02 11:53:54,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:54,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:54,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:54,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:54,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:55,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:55,677 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 11:53:55,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:53:55,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-02 11:53:55,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:55,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:55,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:55,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 11:53:55,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:53:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:53:55,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:53:55,828 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 54 states. [2018-10-02 11:53:55,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:55,998 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-02 11:53:55,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:53:55,998 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 210 [2018-10-02 11:53:55,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:56,000 INFO L225 Difference]: With dead ends: 217 [2018-10-02 11:53:56,000 INFO L226 Difference]: Without dead ends: 215 [2018-10-02 11:53:56,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:53:56,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-02 11:53:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-10-02 11:53:56,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-02 11:53:56,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-10-02 11:53:56,004 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 210 [2018-10-02 11:53:56,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:56,005 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-10-02 11:53:56,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:53:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-10-02 11:53:56,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-02 11:53:56,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:56,006 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:56,006 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:56,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:56,006 INFO L82 PathProgramCache]: Analyzing trace with hash -781321964, now seen corresponding path program 52 times [2018-10-02 11:53:56,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:56,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:56,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:56,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:57,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:57,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:57,081 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:53:57,122 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:53:57,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:57,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:57,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:57,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 11:53:57,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 11:53:57,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 11:53:57,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:53:57,205 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 55 states. [2018-10-02 11:53:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:57,314 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-10-02 11:53:57,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:53:57,314 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 214 [2018-10-02 11:53:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:57,316 INFO L225 Difference]: With dead ends: 221 [2018-10-02 11:53:57,316 INFO L226 Difference]: Without dead ends: 219 [2018-10-02 11:53:57,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:53:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-02 11:53:57,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-02 11:53:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-02 11:53:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-10-02 11:53:57,320 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 214 [2018-10-02 11:53:57,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:57,321 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-10-02 11:53:57,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 11:53:57,321 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-10-02 11:53:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-02 11:53:57,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:57,322 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:57,323 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:57,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:57,323 INFO L82 PathProgramCache]: Analyzing trace with hash -348873538, now seen corresponding path program 53 times [2018-10-02 11:53:57,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:57,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:57,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:57,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:57,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:53:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:58,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:53:58,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:53:58,817 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:53:58,886 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-02 11:53:58,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:53:58,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:53:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:53:58,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:53:58,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 11:53:58,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:53:58,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:53:58,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:53:58,952 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 56 states. [2018-10-02 11:53:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:53:59,044 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-10-02 11:53:59,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:53:59,044 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 218 [2018-10-02 11:53:59,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:53:59,045 INFO L225 Difference]: With dead ends: 225 [2018-10-02 11:53:59,045 INFO L226 Difference]: Without dead ends: 223 [2018-10-02 11:53:59,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:53:59,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-02 11:53:59,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-10-02 11:53:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-02 11:53:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-10-02 11:53:59,049 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 218 [2018-10-02 11:53:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:53:59,049 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-10-02 11:53:59,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:53:59,049 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-10-02 11:53:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-02 11:53:59,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:53:59,050 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2018-10-02 11:53:59,051 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:53:59,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:53:59,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1269998744, now seen corresponding path program 54 times [2018-10-02 11:53:59,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:53:59,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:53:59,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:59,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:53:59,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:53:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:00,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:00,198 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 11:54:00,204 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:00,272 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 11:54:00,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:00,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:00,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:00,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-02 11:54:00,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 11:54:00,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 11:54:00,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:54:00,339 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 57 states. [2018-10-02 11:54:00,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:00,432 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-10-02 11:54:00,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:54:00,433 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2018-10-02 11:54:00,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:00,434 INFO L225 Difference]: With dead ends: 229 [2018-10-02 11:54:00,434 INFO L226 Difference]: Without dead ends: 227 [2018-10-02 11:54:00,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:54:00,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-02 11:54:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-10-02 11:54:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-02 11:54:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-10-02 11:54:00,438 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 222 [2018-10-02 11:54:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:00,438 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-10-02 11:54:00,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 11:54:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-10-02 11:54:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-02 11:54:00,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:00,440 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:00,440 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:00,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:00,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1338854126, now seen corresponding path program 55 times [2018-10-02 11:54:00,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:00,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:00,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:00,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:00,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:01,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:01,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:01,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:01,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:01,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 11:54:01,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:54:01,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:54:01,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:54:01,912 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 58 states. [2018-10-02 11:54:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:02,065 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-10-02 11:54:02,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:54:02,065 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 226 [2018-10-02 11:54:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:02,069 INFO L225 Difference]: With dead ends: 233 [2018-10-02 11:54:02,069 INFO L226 Difference]: Without dead ends: 231 [2018-10-02 11:54:02,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:54:02,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-02 11:54:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-02 11:54:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-02 11:54:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-10-02 11:54:02,073 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 226 [2018-10-02 11:54:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:02,073 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-10-02 11:54:02,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:54:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-10-02 11:54:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-02 11:54:02,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:02,074 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:02,075 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:02,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash 555690428, now seen corresponding path program 56 times [2018-10-02 11:54:02,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:02,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:02,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:02,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:02,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:03,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:03,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:03,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:03,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:03,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:03,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:03,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:03,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 11:54:03,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:54:03,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:54:03,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:54:03,526 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 59 states. [2018-10-02 11:54:04,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:04,561 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-10-02 11:54:04,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:54:04,562 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 230 [2018-10-02 11:54:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:04,563 INFO L225 Difference]: With dead ends: 237 [2018-10-02 11:54:04,563 INFO L226 Difference]: Without dead ends: 235 [2018-10-02 11:54:04,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:54:04,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-10-02 11:54:04,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-10-02 11:54:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-02 11:54:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-10-02 11:54:04,567 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 230 [2018-10-02 11:54:04,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:04,567 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-10-02 11:54:04,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:54:04,567 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-10-02 11:54:04,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-02 11:54:04,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:04,568 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:04,568 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:04,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1475528346, now seen corresponding path program 57 times [2018-10-02 11:54:04,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:04,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:04,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:04,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:04,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:05,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:05,832 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 11:54:05,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:05,934 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-02 11:54:05,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:05,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:06,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:06,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-02 11:54:06,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:54:06,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:54:06,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:54:06,042 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 60 states. [2018-10-02 11:54:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:06,273 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-10-02 11:54:06,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:54:06,274 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 234 [2018-10-02 11:54:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:06,276 INFO L225 Difference]: With dead ends: 241 [2018-10-02 11:54:06,276 INFO L226 Difference]: Without dead ends: 239 [2018-10-02 11:54:06,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:54:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-02 11:54:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-10-02 11:54:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-02 11:54:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-10-02 11:54:06,280 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 234 [2018-10-02 11:54:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:06,280 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-10-02 11:54:06,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:54:06,280 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-10-02 11:54:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-02 11:54:06,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:06,281 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:06,281 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:06,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash -457743344, now seen corresponding path program 58 times [2018-10-02 11:54:06,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:06,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:06,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:06,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:06,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:07,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:07,680 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:07,739 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:07,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:07,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:07,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:07,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-02 11:54:07,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 11:54:07,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 11:54:07,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:54:07,837 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 61 states. [2018-10-02 11:54:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:08,037 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-10-02 11:54:08,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:54:08,037 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 238 [2018-10-02 11:54:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:08,039 INFO L225 Difference]: With dead ends: 245 [2018-10-02 11:54:08,039 INFO L226 Difference]: Without dead ends: 243 [2018-10-02 11:54:08,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:54:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-02 11:54:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-10-02 11:54:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-10-02 11:54:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-10-02 11:54:08,043 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 238 [2018-10-02 11:54:08,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:08,043 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-10-02 11:54:08,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 11:54:08,043 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-10-02 11:54:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-02 11:54:08,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:08,044 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:08,044 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:08,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:08,044 INFO L82 PathProgramCache]: Analyzing trace with hash 362293690, now seen corresponding path program 59 times [2018-10-02 11:54:08,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:08,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:08,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:08,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:08,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:09,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:09,754 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 11:54:09,761 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:09,840 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-02 11:54:09,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:09,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:09,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:09,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-02 11:54:09,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:54:09,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:54:09,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:54:09,915 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 62 states. [2018-10-02 11:54:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:10,075 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-10-02 11:54:10,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:54:10,075 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2018-10-02 11:54:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:10,076 INFO L225 Difference]: With dead ends: 249 [2018-10-02 11:54:10,077 INFO L226 Difference]: Without dead ends: 247 [2018-10-02 11:54:10,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:54:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-10-02 11:54:10,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-10-02 11:54:10,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-10-02 11:54:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-10-02 11:54:10,080 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 242 [2018-10-02 11:54:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:10,081 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-10-02 11:54:10,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:54:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-10-02 11:54:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-02 11:54:10,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:10,082 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:10,083 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:10,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:10,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1209398684, now seen corresponding path program 60 times [2018-10-02 11:54:10,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:10,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:10,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:10,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:10,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:11,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:11,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:11,792 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:11,869 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-02 11:54:11,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:11,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:11,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:11,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-02 11:54:11,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 11:54:11,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 11:54:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:54:11,943 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 63 states. [2018-10-02 11:54:12,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:12,099 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-10-02 11:54:12,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:54:12,099 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2018-10-02 11:54:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:12,101 INFO L225 Difference]: With dead ends: 253 [2018-10-02 11:54:12,101 INFO L226 Difference]: Without dead ends: 251 [2018-10-02 11:54:12,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:54:12,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-02 11:54:12,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-10-02 11:54:12,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-02 11:54:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-10-02 11:54:12,105 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 246 [2018-10-02 11:54:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:12,105 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-10-02 11:54:12,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 11:54:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-10-02 11:54:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-02 11:54:12,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:12,106 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:12,106 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:12,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:12,107 INFO L82 PathProgramCache]: Analyzing trace with hash 665290254, now seen corresponding path program 61 times [2018-10-02 11:54:12,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:12,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:12,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:12,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:12,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:13,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:13,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:13,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:13,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:13,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:13,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-02 11:54:13,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:54:13,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:54:13,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:54:13,754 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 64 states. [2018-10-02 11:54:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:13,936 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-10-02 11:54:13,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:54:13,936 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 250 [2018-10-02 11:54:13,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:13,937 INFO L225 Difference]: With dead ends: 257 [2018-10-02 11:54:13,937 INFO L226 Difference]: Without dead ends: 255 [2018-10-02 11:54:13,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:54:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-02 11:54:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-10-02 11:54:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-02 11:54:13,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-10-02 11:54:13,940 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 250 [2018-10-02 11:54:13,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:13,941 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-10-02 11:54:13,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:54:13,941 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-10-02 11:54:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-02 11:54:13,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:13,942 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:13,942 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:13,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1066081464, now seen corresponding path program 62 times [2018-10-02 11:54:13,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:13,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:13,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:13,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:13,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:15,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:15,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:15,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:15,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:15,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:15,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:15,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:15,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-02 11:54:15,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:54:15,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:54:15,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:54:15,609 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 65 states. [2018-10-02 11:54:15,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:15,761 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-10-02 11:54:15,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:54:15,761 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2018-10-02 11:54:15,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:15,763 INFO L225 Difference]: With dead ends: 261 [2018-10-02 11:54:15,763 INFO L226 Difference]: Without dead ends: 259 [2018-10-02 11:54:15,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:54:15,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-02 11:54:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-10-02 11:54:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-02 11:54:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-10-02 11:54:15,767 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 254 [2018-10-02 11:54:15,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:15,767 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-10-02 11:54:15,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:54:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-10-02 11:54:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-02 11:54:15,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:15,768 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:15,769 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:15,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash -116437406, now seen corresponding path program 63 times [2018-10-02 11:54:15,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:15,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:15,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:15,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:15,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:17,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:17,295 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 11:54:17,302 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:17,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-02 11:54:17,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:17,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:17,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:17,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-02 11:54:17,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:54:17,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:54:17,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:54:17,467 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 66 states. [2018-10-02 11:54:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:17,649 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-10-02 11:54:17,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:54:17,650 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 258 [2018-10-02 11:54:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:17,651 INFO L225 Difference]: With dead ends: 265 [2018-10-02 11:54:17,652 INFO L226 Difference]: Without dead ends: 263 [2018-10-02 11:54:17,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:54:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-10-02 11:54:17,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-10-02 11:54:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-02 11:54:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-10-02 11:54:17,656 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 258 [2018-10-02 11:54:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:17,656 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-10-02 11:54:17,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:54:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-10-02 11:54:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-02 11:54:17,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:17,658 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:17,658 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:17,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:17,658 INFO L82 PathProgramCache]: Analyzing trace with hash 208575244, now seen corresponding path program 64 times [2018-10-02 11:54:17,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:17,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:17,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:17,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:17,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:17,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:19,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:19,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:19,703 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:19,749 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:19,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:19,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:19,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:19,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-02 11:54:19,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 11:54:19,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 11:54:19,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:54:19,851 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 67 states. [2018-10-02 11:54:20,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:20,065 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-10-02 11:54:20,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:54:20,066 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 262 [2018-10-02 11:54:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:20,067 INFO L225 Difference]: With dead ends: 269 [2018-10-02 11:54:20,067 INFO L226 Difference]: Without dead ends: 267 [2018-10-02 11:54:20,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:54:20,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-02 11:54:20,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-10-02 11:54:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-10-02 11:54:20,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-10-02 11:54:20,071 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 262 [2018-10-02 11:54:20,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:20,072 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-10-02 11:54:20,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 11:54:20,072 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-10-02 11:54:20,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-02 11:54:20,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:20,073 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:20,074 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:20,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:20,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1868332362, now seen corresponding path program 65 times [2018-10-02 11:54:20,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:20,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:20,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:20,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:20,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:21,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:21,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:21,730 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:21,822 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-02 11:54:21,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:21,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:21,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:21,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-02 11:54:21,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:54:21,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:54:21,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:54:21,926 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 68 states. [2018-10-02 11:54:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:22,122 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-10-02 11:54:22,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:54:22,123 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 266 [2018-10-02 11:54:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:22,124 INFO L225 Difference]: With dead ends: 273 [2018-10-02 11:54:22,124 INFO L226 Difference]: Without dead ends: 271 [2018-10-02 11:54:22,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:54:22,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-10-02 11:54:22,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-10-02 11:54:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-10-02 11:54:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-10-02 11:54:22,129 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 266 [2018-10-02 11:54:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:22,130 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-10-02 11:54:22,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:54:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-10-02 11:54:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-10-02 11:54:22,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:22,131 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:22,132 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:22,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:22,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1687648928, now seen corresponding path program 66 times [2018-10-02 11:54:22,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:22,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:22,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:22,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:22,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:23,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:23,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:23,859 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:23,971 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-02 11:54:23,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:23,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:24,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:24,070 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-02 11:54:24,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 11:54:24,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 11:54:24,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:54:24,071 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 69 states. [2018-10-02 11:54:24,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:24,278 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-10-02 11:54:24,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:54:24,278 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 270 [2018-10-02 11:54:24,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:24,279 INFO L225 Difference]: With dead ends: 277 [2018-10-02 11:54:24,279 INFO L226 Difference]: Without dead ends: 275 [2018-10-02 11:54:24,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:54:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-02 11:54:24,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-10-02 11:54:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-02 11:54:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-10-02 11:54:24,282 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 270 [2018-10-02 11:54:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:24,282 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-10-02 11:54:24,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 11:54:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-10-02 11:54:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-02 11:54:24,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:24,283 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:24,283 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:24,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:24,284 INFO L82 PathProgramCache]: Analyzing trace with hash -516414710, now seen corresponding path program 67 times [2018-10-02 11:54:24,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:24,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:24,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:24,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:24,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:25,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:25,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:25,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:26,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:26,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:26,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-02 11:54:26,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:54:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:54:26,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:54:26,135 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 70 states. [2018-10-02 11:54:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:26,373 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-10-02 11:54:26,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:54:26,373 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 274 [2018-10-02 11:54:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:26,375 INFO L225 Difference]: With dead ends: 281 [2018-10-02 11:54:26,375 INFO L226 Difference]: Without dead ends: 279 [2018-10-02 11:54:26,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:54:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-02 11:54:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-10-02 11:54:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-10-02 11:54:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2018-10-02 11:54:26,379 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 274 [2018-10-02 11:54:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:26,379 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2018-10-02 11:54:26,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:54:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2018-10-02 11:54:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-10-02 11:54:26,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:26,381 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:26,381 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:26,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:26,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1431100340, now seen corresponding path program 68 times [2018-10-02 11:54:26,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:26,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:26,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:26,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:26,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:28,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:28,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:28,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:28,461 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:28,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:28,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:28,545 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:28,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-02 11:54:28,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:54:28,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:54:28,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:54:28,546 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 71 states. [2018-10-02 11:54:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:28,763 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-10-02 11:54:28,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:54:28,764 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-10-02 11:54:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:28,765 INFO L225 Difference]: With dead ends: 285 [2018-10-02 11:54:28,765 INFO L226 Difference]: Without dead ends: 283 [2018-10-02 11:54:28,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:54:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-10-02 11:54:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-10-02 11:54:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-10-02 11:54:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-10-02 11:54:28,769 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 278 [2018-10-02 11:54:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:28,770 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-10-02 11:54:28,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:54:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-10-02 11:54:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-02 11:54:28,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:28,771 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:28,771 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:28,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:28,771 INFO L82 PathProgramCache]: Analyzing trace with hash -912183458, now seen corresponding path program 69 times [2018-10-02 11:54:28,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:28,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:28,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:28,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:28,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:30,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:30,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:30,933 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:31,032 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-02 11:54:31,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:31,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:31,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:31,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-02 11:54:31,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:54:31,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:54:31,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:54:31,135 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 72 states. [2018-10-02 11:54:31,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:31,317 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-10-02 11:54:31,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:54:31,317 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 282 [2018-10-02 11:54:31,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:31,319 INFO L225 Difference]: With dead ends: 289 [2018-10-02 11:54:31,319 INFO L226 Difference]: Without dead ends: 287 [2018-10-02 11:54:31,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:54:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-10-02 11:54:31,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-10-02 11:54:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-10-02 11:54:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-10-02 11:54:31,323 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 282 [2018-10-02 11:54:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:31,323 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-10-02 11:54:31,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:54:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-10-02 11:54:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-10-02 11:54:31,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:31,325 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:31,325 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:31,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:31,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1896899064, now seen corresponding path program 70 times [2018-10-02 11:54:31,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:31,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:31,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:31,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:31,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:33,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:33,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:33,171 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:33,233 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:33,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:33,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:33,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:33,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-02 11:54:33,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-02 11:54:33,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-02 11:54:33,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:54:33,326 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 73 states. [2018-10-02 11:54:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:33,547 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-10-02 11:54:33,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:54:33,547 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 286 [2018-10-02 11:54:33,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:33,549 INFO L225 Difference]: With dead ends: 293 [2018-10-02 11:54:33,549 INFO L226 Difference]: Without dead ends: 291 [2018-10-02 11:54:33,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:54:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-02 11:54:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-10-02 11:54:33,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-10-02 11:54:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2018-10-02 11:54:33,554 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 286 [2018-10-02 11:54:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:33,554 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2018-10-02 11:54:33,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-02 11:54:33,554 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2018-10-02 11:54:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-02 11:54:33,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:33,556 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:33,556 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:33,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:33,556 INFO L82 PathProgramCache]: Analyzing trace with hash 347252658, now seen corresponding path program 71 times [2018-10-02 11:54:33,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:33,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:33,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:33,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:33,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 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 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 11:54:35,816 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:35,924 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-02 11:54:35,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:35,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:36,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:36,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-02 11:54:36,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:54:36,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:54:36,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:54:36,065 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 74 states. [2018-10-02 11:54:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:36,319 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-10-02 11:54:36,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 11:54:36,319 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 290 [2018-10-02 11:54:36,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:36,321 INFO L225 Difference]: With dead ends: 297 [2018-10-02 11:54:36,321 INFO L226 Difference]: Without dead ends: 295 [2018-10-02 11:54:36,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:54:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-10-02 11:54:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-10-02 11:54:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-10-02 11:54:36,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2018-10-02 11:54:36,326 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 290 [2018-10-02 11:54:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:36,326 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2018-10-02 11:54:36,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:54:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2018-10-02 11:54:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-10-02 11:54:36,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:36,328 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:36,328 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:36,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:36,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1994077092, now seen corresponding path program 72 times [2018-10-02 11:54:36,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:36,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:36,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:36,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:36,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:38,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:38,455 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 11:54:38,463 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:38,567 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-02 11:54:38,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:38,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:38,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:38,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-02 11:54:38,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-02 11:54:38,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-02 11:54:38,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:54:38,665 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 75 states. [2018-10-02 11:54:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:38,931 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-10-02 11:54:38,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:54:38,931 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 294 [2018-10-02 11:54:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:38,932 INFO L225 Difference]: With dead ends: 301 [2018-10-02 11:54:38,933 INFO L226 Difference]: Without dead ends: 299 [2018-10-02 11:54:38,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:54:38,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-02 11:54:38,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-10-02 11:54:38,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-02 11:54:38,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-10-02 11:54:38,935 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 294 [2018-10-02 11:54:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:38,936 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-10-02 11:54:38,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-02 11:54:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-10-02 11:54:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-02 11:54:38,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:38,937 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:38,937 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:38,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:38,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2034273286, now seen corresponding path program 73 times [2018-10-02 11:54:38,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:38,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:38,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:38,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:38,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:41,295 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 11:54:41,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:41,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:41,455 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:41,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-02 11:54:41,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 11:54:41,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 11:54:41,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:54:41,457 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 76 states. [2018-10-02 11:54:41,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:41,750 INFO L93 Difference]: Finished difference Result 305 states and 305 transitions. [2018-10-02 11:54:41,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 11:54:41,751 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 298 [2018-10-02 11:54:41,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:41,752 INFO L225 Difference]: With dead ends: 305 [2018-10-02 11:54:41,753 INFO L226 Difference]: Without dead ends: 303 [2018-10-02 11:54:41,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:54:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-02 11:54:41,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-10-02 11:54:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-10-02 11:54:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2018-10-02 11:54:41,756 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 298 [2018-10-02 11:54:41,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:41,756 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2018-10-02 11:54:41,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 11:54:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2018-10-02 11:54:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-10-02 11:54:41,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:41,757 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:41,758 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:41,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1891657392, now seen corresponding path program 74 times [2018-10-02 11:54:41,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:41,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:41,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:41,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:41,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:43,858 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 11:54:43,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:43,924 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:43,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:43,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:44,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-02 11:54:44,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 11:54:44,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 11:54:44,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:54:44,060 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 77 states. [2018-10-02 11:54:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:44,425 INFO L93 Difference]: Finished difference Result 309 states and 309 transitions. [2018-10-02 11:54:44,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:54:44,425 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 302 [2018-10-02 11:54:44,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:44,427 INFO L225 Difference]: With dead ends: 309 [2018-10-02 11:54:44,427 INFO L226 Difference]: Without dead ends: 307 [2018-10-02 11:54:44,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:54:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-10-02 11:54:44,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-10-02 11:54:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-10-02 11:54:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2018-10-02 11:54:44,430 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 302 [2018-10-02 11:54:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:44,430 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2018-10-02 11:54:44,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 11:54:44,430 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2018-10-02 11:54:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-02 11:54:44,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:44,432 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:44,432 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:44,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:44,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1709253542, now seen corresponding path program 75 times [2018-10-02 11:54:44,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:44,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:44,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:44,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:46,715 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 11:54:46,721 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:46,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-02 11:54:46,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:46,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:46,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-02 11:54:46,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:54:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:54:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:54:46,935 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 78 states. [2018-10-02 11:54:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:47,380 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-10-02 11:54:47,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 11:54:47,381 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 306 [2018-10-02 11:54:47,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:47,383 INFO L225 Difference]: With dead ends: 313 [2018-10-02 11:54:47,383 INFO L226 Difference]: Without dead ends: 311 [2018-10-02 11:54:47,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:54:47,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-10-02 11:54:47,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-10-02 11:54:47,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-02 11:54:47,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-10-02 11:54:47,387 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 306 [2018-10-02 11:54:47,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:47,388 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-10-02 11:54:47,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:54:47,388 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-10-02 11:54:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-02 11:54:47,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:47,390 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:47,390 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:47,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1586916612, now seen corresponding path program 76 times [2018-10-02 11:54:47,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:47,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:47,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:47,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:51,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:51,570 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 11:54:51,577 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:51,639 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:51,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:51,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:51,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:51,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-02 11:54:51,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-02 11:54:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-02 11:54:51,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:54:51,741 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 79 states. [2018-10-02 11:54:51,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:51,976 INFO L93 Difference]: Finished difference Result 317 states and 317 transitions. [2018-10-02 11:54:51,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 11:54:51,976 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 310 [2018-10-02 11:54:51,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:51,978 INFO L225 Difference]: With dead ends: 317 [2018-10-02 11:54:51,979 INFO L226 Difference]: Without dead ends: 315 [2018-10-02 11:54:51,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:54:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-02 11:54:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-10-02 11:54:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-02 11:54:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2018-10-02 11:54:51,982 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 310 [2018-10-02 11:54:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:51,982 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2018-10-02 11:54:51,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-02 11:54:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2018-10-02 11:54:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-02 11:54:51,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:51,984 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:51,984 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:51,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:51,984 INFO L82 PathProgramCache]: Analyzing trace with hash 102865070, now seen corresponding path program 77 times [2018-10-02 11:54:51,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:51,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:51,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:51,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:54,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:54,172 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 11:54:54,179 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:54,297 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-02 11:54:54,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:54,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:54,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:54,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-02 11:54:54,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:54:54,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:54:54,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:54:54,409 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand 80 states. [2018-10-02 11:54:54,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:54,589 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2018-10-02 11:54:54,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 11:54:54,590 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 314 [2018-10-02 11:54:54,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:54,593 INFO L225 Difference]: With dead ends: 321 [2018-10-02 11:54:54,593 INFO L226 Difference]: Without dead ends: 319 [2018-10-02 11:54:54,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:54:54,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-10-02 11:54:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-10-02 11:54:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-10-02 11:54:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2018-10-02 11:54:54,596 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 314 [2018-10-02 11:54:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:54,597 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2018-10-02 11:54:54,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:54:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2018-10-02 11:54:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-10-02 11:54:54,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:54,598 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:54,598 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:54,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:54,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1467670360, now seen corresponding path program 78 times [2018-10-02 11:54:54,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:54,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:54,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:54,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:54,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:57,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:57,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:54:57,126 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:57,256 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-02 11:54:57,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:57,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:57,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-02 11:54:57,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-02 11:54:57,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-02 11:54:57,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:54:57,365 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand 81 states. [2018-10-02 11:54:57,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:57,553 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-10-02 11:54:57,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 11:54:57,553 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 318 [2018-10-02 11:54:57,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:57,555 INFO L225 Difference]: With dead ends: 325 [2018-10-02 11:54:57,555 INFO L226 Difference]: Without dead ends: 323 [2018-10-02 11:54:57,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:54:57,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-02 11:54:57,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-10-02 11:54:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-10-02 11:54:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-10-02 11:54:57,558 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 318 [2018-10-02 11:54:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:57,558 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-10-02 11:54:57,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-02 11:54:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-10-02 11:54:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-10-02 11:54:57,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:57,559 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2018-10-02 11:54:57,559 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:57,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:57,560 INFO L82 PathProgramCache]: Analyzing trace with hash 941408514, now seen corresponding path program 79 times [2018-10-02 11:54:57,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:57,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:57,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:57,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:57,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:00,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:00,283 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 11:55:00,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:00,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:00,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:00,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-02 11:55:00,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 11:55:00,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 11:55:00,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:55:00,458 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 82 states. [2018-10-02 11:55:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:00,643 INFO L93 Difference]: Finished difference Result 329 states and 329 transitions. [2018-10-02 11:55:00,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-02 11:55:00,644 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 322 [2018-10-02 11:55:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:00,646 INFO L225 Difference]: With dead ends: 329 [2018-10-02 11:55:00,646 INFO L226 Difference]: Without dead ends: 327 [2018-10-02 11:55:00,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:55:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-02 11:55:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-10-02 11:55:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-10-02 11:55:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2018-10-02 11:55:00,650 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 322 [2018-10-02 11:55:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:00,650 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2018-10-02 11:55:00,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 11:55:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2018-10-02 11:55:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-10-02 11:55:00,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:00,651 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:00,651 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:00,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:00,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1279376812, now seen corresponding path program 80 times [2018-10-02 11:55:00,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:00,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:00,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:00,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:00,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:03,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:03,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:03,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:03,117 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:03,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:03,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:03,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:03,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-02 11:55:03,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 11:55:03,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 11:55:03,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:55:03,223 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand 83 states. [2018-10-02 11:55:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:03,564 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-10-02 11:55:03,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 11:55:03,565 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 326 [2018-10-02 11:55:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:03,566 INFO L225 Difference]: With dead ends: 333 [2018-10-02 11:55:03,566 INFO L226 Difference]: Without dead ends: 331 [2018-10-02 11:55:03,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:55:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-10-02 11:55:03,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-10-02 11:55:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-10-02 11:55:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2018-10-02 11:55:03,569 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 326 [2018-10-02 11:55:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:03,569 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2018-10-02 11:55:03,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 11:55:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2018-10-02 11:55:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-02 11:55:03,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:03,571 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:03,571 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:03,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:03,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1763420842, now seen corresponding path program 81 times [2018-10-02 11:55:03,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:03,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:03,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:03,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:03,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:06,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:06,273 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 11:55:06,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:06,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-02 11:55:06,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:06,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:06,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:06,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-02 11:55:06,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 11:55:06,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 11:55:06,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:55:06,526 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 84 states. [2018-10-02 11:55:06,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:06,802 INFO L93 Difference]: Finished difference Result 337 states and 337 transitions. [2018-10-02 11:55:06,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-02 11:55:06,803 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 330 [2018-10-02 11:55:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:06,804 INFO L225 Difference]: With dead ends: 337 [2018-10-02 11:55:06,804 INFO L226 Difference]: Without dead ends: 335 [2018-10-02 11:55:06,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:55:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-10-02 11:55:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-10-02 11:55:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-10-02 11:55:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2018-10-02 11:55:06,808 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 330 [2018-10-02 11:55:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:06,808 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2018-10-02 11:55:06,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 11:55:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2018-10-02 11:55:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-10-02 11:55:06,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:06,809 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:06,809 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:06,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:06,810 INFO L82 PathProgramCache]: Analyzing trace with hash 431949824, now seen corresponding path program 82 times [2018-10-02 11:55:06,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:06,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:06,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:06,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:06,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:09,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:09,477 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 11:55:09,485 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:09,552 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:09,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:09,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:09,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:09,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-02 11:55:09,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-02 11:55:09,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-02 11:55:09,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:55:09,699 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand 85 states. [2018-10-02 11:55:10,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:10,065 INFO L93 Difference]: Finished difference Result 341 states and 341 transitions. [2018-10-02 11:55:10,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-02 11:55:10,065 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 334 [2018-10-02 11:55:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:10,067 INFO L225 Difference]: With dead ends: 341 [2018-10-02 11:55:10,067 INFO L226 Difference]: Without dead ends: 339 [2018-10-02 11:55:10,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:55:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-02 11:55:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-10-02 11:55:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-10-02 11:55:10,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2018-10-02 11:55:10,070 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 334 [2018-10-02 11:55:10,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:10,070 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2018-10-02 11:55:10,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-02 11:55:10,070 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2018-10-02 11:55:10,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-02 11:55:10,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:10,071 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:10,072 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:10,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:10,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1967936938, now seen corresponding path program 83 times [2018-10-02 11:55:10,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:10,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:10,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:10,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:10,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:12,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:12,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:12,864 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:12,993 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-02 11:55:12,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:12,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:13,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:13,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-02 11:55:13,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 11:55:13,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 11:55:13,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:55:13,108 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 86 states. [2018-10-02 11:55:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:13,396 INFO L93 Difference]: Finished difference Result 345 states and 345 transitions. [2018-10-02 11:55:13,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-02 11:55:13,396 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 338 [2018-10-02 11:55:13,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:13,398 INFO L225 Difference]: With dead ends: 345 [2018-10-02 11:55:13,398 INFO L226 Difference]: Without dead ends: 343 [2018-10-02 11:55:13,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:55:13,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-10-02 11:55:13,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-10-02 11:55:13,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-10-02 11:55:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2018-10-02 11:55:13,401 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 338 [2018-10-02 11:55:13,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:13,402 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2018-10-02 11:55:13,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 11:55:13,402 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2018-10-02 11:55:13,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-10-02 11:55:13,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:13,403 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:13,403 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:13,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:13,404 INFO L82 PathProgramCache]: Analyzing trace with hash -2000241068, now seen corresponding path program 84 times [2018-10-02 11:55:13,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:13,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:13,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:13,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:13,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:16,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:16,346 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 11:55:16,353 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:16,485 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-02 11:55:16,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:16,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:16,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:16,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-02 11:55:16,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-02 11:55:16,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-02 11:55:16,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:55:16,601 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand 87 states. [2018-10-02 11:55:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:16,958 INFO L93 Difference]: Finished difference Result 349 states and 349 transitions. [2018-10-02 11:55:16,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-02 11:55:16,958 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 342 [2018-10-02 11:55:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:16,960 INFO L225 Difference]: With dead ends: 349 [2018-10-02 11:55:16,960 INFO L226 Difference]: Without dead ends: 347 [2018-10-02 11:55:16,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:55:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-10-02 11:55:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-10-02 11:55:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-10-02 11:55:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2018-10-02 11:55:16,965 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 342 [2018-10-02 11:55:16,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:16,965 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2018-10-02 11:55:16,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-02 11:55:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2018-10-02 11:55:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-10-02 11:55:16,967 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:16,967 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:16,967 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:16,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:16,968 INFO L82 PathProgramCache]: Analyzing trace with hash 304660990, now seen corresponding path program 85 times [2018-10-02 11:55:16,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:16,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:16,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:16,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:16,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:19,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:19,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:19,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:19,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:19,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:19,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-02 11:55:19,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 11:55:19,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 11:55:19,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:55:19,952 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 88 states. [2018-10-02 11:55:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:20,309 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2018-10-02 11:55:20,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-02 11:55:20,309 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 346 [2018-10-02 11:55:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:20,311 INFO L225 Difference]: With dead ends: 353 [2018-10-02 11:55:20,311 INFO L226 Difference]: Without dead ends: 351 [2018-10-02 11:55:20,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:55:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-10-02 11:55:20,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-10-02 11:55:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-10-02 11:55:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 351 transitions. [2018-10-02 11:55:20,314 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 351 transitions. Word has length 346 [2018-10-02 11:55:20,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:20,314 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 351 transitions. [2018-10-02 11:55:20,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 11:55:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 351 transitions. [2018-10-02 11:55:20,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-10-02 11:55:20,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:20,316 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:20,316 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:20,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:20,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1311563944, now seen corresponding path program 86 times [2018-10-02 11:55:20,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:20,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:20,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:20,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:20,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:23,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:23,235 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 11:55:23,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:23,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:23,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:23,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:23,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:23,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-02 11:55:23,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-02 11:55:23,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-02 11:55:23,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:55:23,428 INFO L87 Difference]: Start difference. First operand 351 states and 351 transitions. Second operand 89 states. [2018-10-02 11:55:23,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:23,823 INFO L93 Difference]: Finished difference Result 357 states and 357 transitions. [2018-10-02 11:55:23,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-02 11:55:23,824 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 350 [2018-10-02 11:55:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:23,826 INFO L225 Difference]: With dead ends: 357 [2018-10-02 11:55:23,826 INFO L226 Difference]: Without dead ends: 355 [2018-10-02 11:55:23,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:55:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-10-02 11:55:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-10-02 11:55:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-10-02 11:55:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2018-10-02 11:55:23,830 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 350 [2018-10-02 11:55:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:23,830 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2018-10-02 11:55:23,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-02 11:55:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2018-10-02 11:55:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-02 11:55:23,832 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:23,832 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:23,832 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:23,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:23,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1739744686, now seen corresponding path program 87 times [2018-10-02 11:55:23,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:23,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:23,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:23,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:23,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:27,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:27,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:27,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:27,163 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-02 11:55:27,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:27,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:27,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:27,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-02 11:55:27,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 11:55:27,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 11:55:27,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:55:27,287 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand 90 states. [2018-10-02 11:55:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:27,503 INFO L93 Difference]: Finished difference Result 361 states and 361 transitions. [2018-10-02 11:55:27,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-02 11:55:27,503 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 354 [2018-10-02 11:55:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:27,504 INFO L225 Difference]: With dead ends: 361 [2018-10-02 11:55:27,504 INFO L226 Difference]: Without dead ends: 359 [2018-10-02 11:55:27,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:55:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-10-02 11:55:27,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-10-02 11:55:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-10-02 11:55:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 359 transitions. [2018-10-02 11:55:27,509 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 359 transitions. Word has length 354 [2018-10-02 11:55:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:27,510 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 359 transitions. [2018-10-02 11:55:27,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 11:55:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 359 transitions. [2018-10-02 11:55:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-10-02 11:55:27,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:27,512 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:27,512 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:27,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:27,512 INFO L82 PathProgramCache]: Analyzing trace with hash 180711164, now seen corresponding path program 88 times [2018-10-02 11:55:27,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:27,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:27,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:27,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:27,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:30,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:30,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:30,488 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:30,566 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:30,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:30,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:30,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:30,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-02 11:55:30,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-02 11:55:30,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-02 11:55:30,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:55:30,712 INFO L87 Difference]: Start difference. First operand 359 states and 359 transitions. Second operand 91 states. [2018-10-02 11:55:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:31,096 INFO L93 Difference]: Finished difference Result 365 states and 365 transitions. [2018-10-02 11:55:31,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-02 11:55:31,096 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 358 [2018-10-02 11:55:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:31,098 INFO L225 Difference]: With dead ends: 365 [2018-10-02 11:55:31,099 INFO L226 Difference]: Without dead ends: 363 [2018-10-02 11:55:31,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:55:31,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-02 11:55:31,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-10-02 11:55:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-10-02 11:55:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2018-10-02 11:55:31,102 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 358 [2018-10-02 11:55:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:31,103 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2018-10-02 11:55:31,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-02 11:55:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2018-10-02 11:55:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-10-02 11:55:31,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:31,104 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:31,104 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:31,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash 512679590, now seen corresponding path program 89 times [2018-10-02 11:55:31,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:31,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:31,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:31,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:31,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:34,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:34,162 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 11:55:34,171 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:34,319 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-02 11:55:34,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:34,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:34,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:34,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-02 11:55:34,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 11:55:34,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 11:55:34,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:55:34,448 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 92 states. [2018-10-02 11:55:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:34,880 INFO L93 Difference]: Finished difference Result 369 states and 369 transitions. [2018-10-02 11:55:34,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-02 11:55:34,880 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 362 [2018-10-02 11:55:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:34,883 INFO L225 Difference]: With dead ends: 369 [2018-10-02 11:55:34,883 INFO L226 Difference]: Without dead ends: 367 [2018-10-02 11:55:34,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:55:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-10-02 11:55:34,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2018-10-02 11:55:34,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2018-10-02 11:55:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 367 transitions. [2018-10-02 11:55:34,887 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 367 transitions. Word has length 362 [2018-10-02 11:55:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:34,887 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 367 transitions. [2018-10-02 11:55:34,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 11:55:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 367 transitions. [2018-10-02 11:55:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2018-10-02 11:55:34,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:34,889 INFO L375 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:34,889 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:34,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:34,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1264871760, now seen corresponding path program 90 times [2018-10-02 11:55:34,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:34,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:34,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:34,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:34,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:38,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:38,059 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 11:55:38,067 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:38,250 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-02 11:55:38,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:38,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:38,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:38,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-02 11:55:38,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-02 11:55:38,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-02 11:55:38,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-02 11:55:38,387 INFO L87 Difference]: Start difference. First operand 367 states and 367 transitions. Second operand 93 states. [2018-10-02 11:55:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:38,788 INFO L93 Difference]: Finished difference Result 373 states and 373 transitions. [2018-10-02 11:55:38,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-02 11:55:38,789 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 366 [2018-10-02 11:55:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:38,791 INFO L225 Difference]: With dead ends: 373 [2018-10-02 11:55:38,791 INFO L226 Difference]: Without dead ends: 371 [2018-10-02 11:55:38,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-02 11:55:38,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2018-10-02 11:55:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2018-10-02 11:55:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2018-10-02 11:55:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 371 transitions. [2018-10-02 11:55:38,795 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 371 transitions. Word has length 366 [2018-10-02 11:55:38,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:38,795 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 371 transitions. [2018-10-02 11:55:38,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-02 11:55:38,795 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 371 transitions. [2018-10-02 11:55:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2018-10-02 11:55:38,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:38,796 INFO L375 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:38,797 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:38,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1480552710, now seen corresponding path program 91 times [2018-10-02 11:55:38,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:38,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:38,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:38,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:38,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:42,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:42,140 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 11:55:42,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:42,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:42,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:42,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-02 11:55:42,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 11:55:42,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 11:55:42,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:55:42,342 INFO L87 Difference]: Start difference. First operand 371 states and 371 transitions. Second operand 94 states. [2018-10-02 11:55:42,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:42,805 INFO L93 Difference]: Finished difference Result 377 states and 377 transitions. [2018-10-02 11:55:42,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-02 11:55:42,805 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 370 [2018-10-02 11:55:42,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:42,807 INFO L225 Difference]: With dead ends: 377 [2018-10-02 11:55:42,807 INFO L226 Difference]: Without dead ends: 375 [2018-10-02 11:55:42,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:55:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-10-02 11:55:42,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2018-10-02 11:55:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2018-10-02 11:55:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 375 transitions. [2018-10-02 11:55:42,811 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 375 transitions. Word has length 370 [2018-10-02 11:55:42,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:42,812 INFO L480 AbstractCegarLoop]: Abstraction has 375 states and 375 transitions. [2018-10-02 11:55:42,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 11:55:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 375 transitions. [2018-10-02 11:55:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2018-10-02 11:55:42,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:42,813 INFO L375 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:42,814 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:42,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:42,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1998729308, now seen corresponding path program 92 times [2018-10-02 11:55:42,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:42,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:42,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:42,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:42,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:42,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:46,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:46,374 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 11:55:46,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:46,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:46,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:46,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 0 proven. 16836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:46,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:46,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-02 11:55:46,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-02 11:55:46,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-02 11:55:46,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:55:46,596 INFO L87 Difference]: Start difference. First operand 375 states and 375 transitions. Second operand 95 states. [2018-10-02 11:55:47,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:47,065 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2018-10-02 11:55:47,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-02 11:55:47,065 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 374 [2018-10-02 11:55:47,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:47,067 INFO L225 Difference]: With dead ends: 381 [2018-10-02 11:55:47,067 INFO L226 Difference]: Without dead ends: 379 [2018-10-02 11:55:47,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:55:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2018-10-02 11:55:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2018-10-02 11:55:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2018-10-02 11:55:47,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 379 transitions. [2018-10-02 11:55:47,071 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 379 transitions. Word has length 374 [2018-10-02 11:55:47,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:47,072 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 379 transitions. [2018-10-02 11:55:47,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-02 11:55:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 379 transitions. [2018-10-02 11:55:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2018-10-02 11:55:47,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:47,073 INFO L375 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:47,073 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:47,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:47,074 INFO L82 PathProgramCache]: Analyzing trace with hash 582396750, now seen corresponding path program 93 times [2018-10-02 11:55:47,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:47,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:47,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:47,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:47,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:51,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:51,334 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 11:55:51,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:51,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-02 11:55:51,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:51,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17205 backedges. 0 proven. 17205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:51,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:51,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-02 11:55:51,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 11:55:51,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 11:55:51,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:55:51,639 INFO L87 Difference]: Start difference. First operand 379 states and 379 transitions. Second operand 96 states. [2018-10-02 11:55:51,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:51,896 INFO L93 Difference]: Finished difference Result 385 states and 385 transitions. [2018-10-02 11:55:51,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-02 11:55:51,897 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 378 [2018-10-02 11:55:51,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:51,899 INFO L225 Difference]: With dead ends: 385 [2018-10-02 11:55:51,899 INFO L226 Difference]: Without dead ends: 383 [2018-10-02 11:55:51,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:55:51,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-10-02 11:55:51,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-10-02 11:55:51,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-10-02 11:55:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 383 transitions. [2018-10-02 11:55:51,903 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 383 transitions. Word has length 378 [2018-10-02 11:55:51,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:51,904 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 383 transitions. [2018-10-02 11:55:51,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 11:55:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 383 transitions. [2018-10-02 11:55:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2018-10-02 11:55:51,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:51,905 INFO L375 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:51,905 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:51,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:51,906 INFO L82 PathProgramCache]: Analyzing trace with hash 671457784, now seen corresponding path program 94 times [2018-10-02 11:55:51,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:51,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:51,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:51,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:51,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:55,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:55,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:55,194 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:55,266 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:55,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:55,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17578 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:55,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:55,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-02 11:55:55,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-02 11:55:55,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-02 11:55:55,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:55:55,425 INFO L87 Difference]: Start difference. First operand 383 states and 383 transitions. Second operand 97 states. [2018-10-02 11:55:55,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:55,898 INFO L93 Difference]: Finished difference Result 389 states and 389 transitions. [2018-10-02 11:55:55,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-02 11:55:55,898 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 382 [2018-10-02 11:55:55,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:55,900 INFO L225 Difference]: With dead ends: 389 [2018-10-02 11:55:55,900 INFO L226 Difference]: Without dead ends: 387 [2018-10-02 11:55:55,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:55:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-10-02 11:55:55,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2018-10-02 11:55:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-10-02 11:55:55,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2018-10-02 11:55:55,904 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 382 [2018-10-02 11:55:55,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:55,904 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2018-10-02 11:55:55,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-02 11:55:55,904 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2018-10-02 11:55:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2018-10-02 11:55:55,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:55,906 INFO L375 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 1, 1, 1, 1, 1, 1] [2018-10-02 11:55:55,906 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:55,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:55,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1782920098, now seen corresponding path program 95 times [2018-10-02 11:55:55,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:55,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:55,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:55,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:55,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:59,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:59,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:59,603 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:59,766 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-02 11:55:59,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:59,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17955 backedges. 0 proven. 17955 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:59,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:59,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-02 11:55:59,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 11:55:59,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 11:55:59,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:55:59,907 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand 98 states. [2018-10-02 11:56:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:00,426 INFO L93 Difference]: Finished difference Result 393 states and 393 transitions. [2018-10-02 11:56:00,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-02 11:56:00,426 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 386 [2018-10-02 11:56:00,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:00,428 INFO L225 Difference]: With dead ends: 393 [2018-10-02 11:56:00,429 INFO L226 Difference]: Without dead ends: 391 [2018-10-02 11:56:00,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:56:00,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2018-10-02 11:56:00,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2018-10-02 11:56:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2018-10-02 11:56:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 391 transitions. [2018-10-02 11:56:00,432 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 391 transitions. Word has length 386 [2018-10-02 11:56:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:00,433 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 391 transitions. [2018-10-02 11:56:00,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 11:56:00,433 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 391 transitions. [2018-10-02 11:56:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2018-10-02 11:56:00,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:00,434 INFO L375 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:00,435 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:00,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2041569356, now seen corresponding path program 96 times [2018-10-02 11:56:00,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:00,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:00,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:00,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:00,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:04,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:04,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:56:04,197 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:04,354 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-02 11:56:04,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:04,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 0 proven. 18336 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:04,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:04,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-02 11:56:04,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-02 11:56:04,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-02 11:56:04,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-02 11:56:04,497 INFO L87 Difference]: Start difference. First operand 391 states and 391 transitions. Second operand 99 states. [2018-10-02 11:56:05,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:05,004 INFO L93 Difference]: Finished difference Result 397 states and 397 transitions. [2018-10-02 11:56:05,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-02 11:56:05,005 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 390 [2018-10-02 11:56:05,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:05,007 INFO L225 Difference]: With dead ends: 397 [2018-10-02 11:56:05,007 INFO L226 Difference]: Without dead ends: 395 [2018-10-02 11:56:05,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-02 11:56:05,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2018-10-02 11:56:05,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2018-10-02 11:56:05,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2018-10-02 11:56:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2018-10-02 11:56:05,012 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 390 [2018-10-02 11:56:05,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:05,012 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2018-10-02 11:56:05,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-02 11:56:05,012 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2018-10-02 11:56:05,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2018-10-02 11:56:05,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:05,014 INFO L375 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:05,014 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:05,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:05,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1161832438, now seen corresponding path program 97 times [2018-10-02 11:56:05,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:05,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:05,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:05,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:05,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:08,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:08,832 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 11:56:08,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:08,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18721 backedges. 0 proven. 18721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:09,064 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:09,064 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-02 11:56:09,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-02 11:56:09,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-02 11:56:09,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:56:09,065 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand 100 states. [2018-10-02 11:56:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:09,611 INFO L93 Difference]: Finished difference Result 401 states and 401 transitions. [2018-10-02 11:56:09,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-02 11:56:09,612 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 394 [2018-10-02 11:56:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:09,614 INFO L225 Difference]: With dead ends: 401 [2018-10-02 11:56:09,614 INFO L226 Difference]: Without dead ends: 399 [2018-10-02 11:56:09,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:56:09,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-10-02 11:56:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 399. [2018-10-02 11:56:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2018-10-02 11:56:09,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 399 transitions. [2018-10-02 11:56:09,619 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 399 transitions. Word has length 394 [2018-10-02 11:56:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:09,619 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 399 transitions. [2018-10-02 11:56:09,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-02 11:56:09,620 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 399 transitions. [2018-10-02 11:56:09,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2018-10-02 11:56:09,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:09,621 INFO L375 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:09,621 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:09,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:09,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1162835296, now seen corresponding path program 98 times [2018-10-02 11:56:09,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:09,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:09,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:09,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:09,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:13,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:13,405 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 11:56:13,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:13,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:13,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:13,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 19110 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:13,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:13,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-02 11:56:13,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-02 11:56:13,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-02 11:56:13,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-02 11:56:13,653 INFO L87 Difference]: Start difference. First operand 399 states and 399 transitions. Second operand 101 states. [2018-10-02 11:56:14,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:14,180 INFO L93 Difference]: Finished difference Result 405 states and 405 transitions. [2018-10-02 11:56:14,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-02 11:56:14,180 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 398 [2018-10-02 11:56:14,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:14,182 INFO L225 Difference]: With dead ends: 405 [2018-10-02 11:56:14,183 INFO L226 Difference]: Without dead ends: 403 [2018-10-02 11:56:14,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-02 11:56:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2018-10-02 11:56:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2018-10-02 11:56:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-10-02 11:56:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2018-10-02 11:56:14,187 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 398 [2018-10-02 11:56:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:14,187 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2018-10-02 11:56:14,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-02 11:56:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2018-10-02 11:56:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-10-02 11:56:14,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:14,189 INFO L375 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:14,189 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:14,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:14,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1719371850, now seen corresponding path program 99 times [2018-10-02 11:56:14,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:14,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:14,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:14,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:14,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:18,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:18,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:56:18,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:18,367 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-02 11:56:18,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:18,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 19503 backedges. 0 proven. 19503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:18,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:18,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-02 11:56:18,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-02 11:56:18,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-02 11:56:18,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:56:18,517 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 102 states. [2018-10-02 11:56:18,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:18,872 INFO L93 Difference]: Finished difference Result 409 states and 409 transitions. [2018-10-02 11:56:18,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-02 11:56:18,872 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 402 [2018-10-02 11:56:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:18,875 INFO L225 Difference]: With dead ends: 409 [2018-10-02 11:56:18,875 INFO L226 Difference]: Without dead ends: 407 [2018-10-02 11:56:18,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:56:18,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-10-02 11:56:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2018-10-02 11:56:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-10-02 11:56:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 407 transitions. [2018-10-02 11:56:18,880 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 407 transitions. Word has length 402 [2018-10-02 11:56:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:18,880 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 407 transitions. [2018-10-02 11:56:18,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-02 11:56:18,881 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 407 transitions. [2018-10-02 11:56:18,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-10-02 11:56:18,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:18,883 INFO L375 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:18,883 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:18,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:18,883 INFO L82 PathProgramCache]: Analyzing trace with hash 333160692, now seen corresponding path program 100 times [2018-10-02 11:56:18,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:18,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:18,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:18,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:18,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:22,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:22,965 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 11:56:22,972 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:23,056 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:23,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:23,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 19900 backedges. 0 proven. 19900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:23,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:23,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-02 11:56:23,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-02 11:56:23,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-02 11:56:23,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-02 11:56:23,231 INFO L87 Difference]: Start difference. First operand 407 states and 407 transitions. Second operand 103 states. [2018-10-02 11:56:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:23,817 INFO L93 Difference]: Finished difference Result 413 states and 413 transitions. [2018-10-02 11:56:23,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-02 11:56:23,817 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 406 [2018-10-02 11:56:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:23,819 INFO L225 Difference]: With dead ends: 413 [2018-10-02 11:56:23,819 INFO L226 Difference]: Without dead ends: 411 [2018-10-02 11:56:23,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-02 11:56:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-10-02 11:56:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2018-10-02 11:56:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-10-02 11:56:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 411 transitions. [2018-10-02 11:56:23,824 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 411 transitions. Word has length 406 [2018-10-02 11:56:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:23,825 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 411 transitions. [2018-10-02 11:56:23,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-02 11:56:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 411 transitions. [2018-10-02 11:56:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-10-02 11:56:23,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:23,827 INFO L375 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:23,827 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:23,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:23,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1825264798, now seen corresponding path program 101 times [2018-10-02 11:56:23,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:23,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:23,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:23,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:23,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:28,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:28,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:56:28,068 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:28,262 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-10-02 11:56:28,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:28,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20301 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:28,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:28,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-02 11:56:28,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-02 11:56:28,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-02 11:56:28,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:56:28,458 INFO L87 Difference]: Start difference. First operand 411 states and 411 transitions. Second operand 104 states. [2018-10-02 11:56:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:29,050 INFO L93 Difference]: Finished difference Result 417 states and 417 transitions. [2018-10-02 11:56:29,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-02 11:56:29,051 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 410 [2018-10-02 11:56:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:29,052 INFO L225 Difference]: With dead ends: 417 [2018-10-02 11:56:29,053 INFO L226 Difference]: Without dead ends: 415 [2018-10-02 11:56:29,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:56:29,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-10-02 11:56:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-10-02 11:56:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-10-02 11:56:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 415 transitions. [2018-10-02 11:56:29,058 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 415 transitions. Word has length 410 [2018-10-02 11:56:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:29,058 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 415 transitions. [2018-10-02 11:56:29,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-02 11:56:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 415 transitions. [2018-10-02 11:56:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2018-10-02 11:56:29,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:29,060 INFO L375 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:29,060 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:29,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:29,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1710939320, now seen corresponding path program 102 times [2018-10-02 11:56:29,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:29,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:29,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:29,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:29,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:33,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:33,279 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 11:56:33,286 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:33,465 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-10-02 11:56:33,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:33,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20706 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:33,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:33,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-02 11:56:33,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-02 11:56:33,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-02 11:56:33,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-02 11:56:33,658 INFO L87 Difference]: Start difference. First operand 415 states and 415 transitions. Second operand 105 states. [2018-10-02 11:56:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:34,217 INFO L93 Difference]: Finished difference Result 421 states and 421 transitions. [2018-10-02 11:56:34,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-02 11:56:34,218 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 414 [2018-10-02 11:56:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:34,219 INFO L225 Difference]: With dead ends: 421 [2018-10-02 11:56:34,219 INFO L226 Difference]: Without dead ends: 419 [2018-10-02 11:56:34,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-02 11:56:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2018-10-02 11:56:34,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2018-10-02 11:56:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2018-10-02 11:56:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 419 transitions. [2018-10-02 11:56:34,224 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 419 transitions. Word has length 414 [2018-10-02 11:56:34,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:34,224 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 419 transitions. [2018-10-02 11:56:34,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-02 11:56:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 419 transitions. [2018-10-02 11:56:34,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2018-10-02 11:56:34,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:34,226 INFO L375 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:34,226 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:34,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:34,226 INFO L82 PathProgramCache]: Analyzing trace with hash -486306574, now seen corresponding path program 103 times [2018-10-02 11:56:34,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:34,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:34,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:34,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:34,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:38,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:38,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:56:38,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:38,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21115 backedges. 0 proven. 21115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:38,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:38,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-02 11:56:38,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-02 11:56:38,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-02 11:56:38,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:56:38,890 INFO L87 Difference]: Start difference. First operand 419 states and 419 transitions. Second operand 106 states. [2018-10-02 11:56:39,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:39,480 INFO L93 Difference]: Finished difference Result 425 states and 425 transitions. [2018-10-02 11:56:39,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-02 11:56:39,481 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 418 [2018-10-02 11:56:39,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:39,482 INFO L225 Difference]: With dead ends: 425 [2018-10-02 11:56:39,482 INFO L226 Difference]: Without dead ends: 423 [2018-10-02 11:56:39,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:56:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-10-02 11:56:39,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2018-10-02 11:56:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2018-10-02 11:56:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 423 transitions. [2018-10-02 11:56:39,487 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 423 transitions. Word has length 418 [2018-10-02 11:56:39,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:39,488 INFO L480 AbstractCegarLoop]: Abstraction has 423 states and 423 transitions. [2018-10-02 11:56:39,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-02 11:56:39,488 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 423 transitions. [2018-10-02 11:56:39,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2018-10-02 11:56:39,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:39,490 INFO L375 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:39,490 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:39,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:39,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1308692892, now seen corresponding path program 104 times [2018-10-02 11:56:39,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:39,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:39,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:39,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:39,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:43,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:43,870 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 11:56:43,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:43,956 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:43,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:43,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 21528 backedges. 0 proven. 21528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:44,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:44,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-02 11:56:44,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-02 11:56:44,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-02 11:56:44,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-02 11:56:44,167 INFO L87 Difference]: Start difference. First operand 423 states and 423 transitions. Second operand 107 states. [2018-10-02 11:56:44,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:44,817 INFO L93 Difference]: Finished difference Result 429 states and 429 transitions. [2018-10-02 11:56:44,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-02 11:56:44,817 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 422 [2018-10-02 11:56:44,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:44,819 INFO L225 Difference]: With dead ends: 429 [2018-10-02 11:56:44,819 INFO L226 Difference]: Without dead ends: 427 [2018-10-02 11:56:44,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-02 11:56:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2018-10-02 11:56:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2018-10-02 11:56:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2018-10-02 11:56:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 427 transitions. [2018-10-02 11:56:44,823 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 427 transitions. Word has length 422 [2018-10-02 11:56:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:44,823 INFO L480 AbstractCegarLoop]: Abstraction has 427 states and 427 transitions. [2018-10-02 11:56:44,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-02 11:56:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 427 transitions. [2018-10-02 11:56:44,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2018-10-02 11:56:44,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:44,825 INFO L375 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:44,825 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:44,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1073230150, now seen corresponding path program 105 times [2018-10-02 11:56:44,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:44,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:44,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:44,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:44,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:49,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:49,258 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 11:56:49,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:49,462 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-10-02 11:56:49,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:49,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21945 backedges. 0 proven. 21945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:49,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:49,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-02 11:56:49,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-02 11:56:49,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-02 11:56:49,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:56:49,656 INFO L87 Difference]: Start difference. First operand 427 states and 427 transitions. Second operand 108 states. [2018-10-02 11:56:50,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:50,089 INFO L93 Difference]: Finished difference Result 433 states and 433 transitions. [2018-10-02 11:56:50,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-02 11:56:50,089 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 426 [2018-10-02 11:56:50,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:50,091 INFO L225 Difference]: With dead ends: 433 [2018-10-02 11:56:50,091 INFO L226 Difference]: Without dead ends: 431 [2018-10-02 11:56:50,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:56:50,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-10-02 11:56:50,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2018-10-02 11:56:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2018-10-02 11:56:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 431 transitions. [2018-10-02 11:56:50,095 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 431 transitions. Word has length 426 [2018-10-02 11:56:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:50,095 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 431 transitions. [2018-10-02 11:56:50,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-02 11:56:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 431 transitions. [2018-10-02 11:56:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2018-10-02 11:56:50,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:50,097 INFO L375 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:50,097 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:50,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash 480472048, now seen corresponding path program 106 times [2018-10-02 11:56:50,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:50,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:50,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:50,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:50,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:54,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:54,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:56:54,669 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:54,756 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:54,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:54,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 22366 backedges. 0 proven. 22366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:54,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:54,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-02 11:56:54,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-02 11:56:54,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-02 11:56:54,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-02 11:56:54,938 INFO L87 Difference]: Start difference. First operand 431 states and 431 transitions. Second operand 109 states. [2018-10-02 11:56:55,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:55,636 INFO L93 Difference]: Finished difference Result 437 states and 437 transitions. [2018-10-02 11:56:55,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-02 11:56:55,637 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 430 [2018-10-02 11:56:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:55,638 INFO L225 Difference]: With dead ends: 437 [2018-10-02 11:56:55,638 INFO L226 Difference]: Without dead ends: 435 [2018-10-02 11:56:55,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-02 11:56:55,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-10-02 11:56:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2018-10-02 11:56:55,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2018-10-02 11:56:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 435 transitions. [2018-10-02 11:56:55,642 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 435 transitions. Word has length 430 [2018-10-02 11:56:55,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:55,643 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 435 transitions. [2018-10-02 11:56:55,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-02 11:56:55,643 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 435 transitions. [2018-10-02 11:56:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2018-10-02 11:56:55,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:55,644 INFO L375 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 1, 1, 1, 1, 1, 1] [2018-10-02 11:56:55,644 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:55,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:55,645 INFO L82 PathProgramCache]: Analyzing trace with hash -427998822, now seen corresponding path program 107 times [2018-10-02 11:56:55,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:55,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:55,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:55,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:55,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22791 backedges. 0 proven. 22791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:00,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:00,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:57:00,149 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:00,346 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-10-02 11:57:00,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:00,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 22791 backedges. 0 proven. 22791 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:00,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:00,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-02 11:57:00,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-02 11:57:00,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-02 11:57:00,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:57:00,538 INFO L87 Difference]: Start difference. First operand 435 states and 435 transitions. Second operand 110 states. [2018-10-02 11:57:01,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:01,086 INFO L93 Difference]: Finished difference Result 441 states and 441 transitions. [2018-10-02 11:57:01,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-02 11:57:01,087 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 434 [2018-10-02 11:57:01,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:01,088 INFO L225 Difference]: With dead ends: 441 [2018-10-02 11:57:01,088 INFO L226 Difference]: Without dead ends: 439 [2018-10-02 11:57:01,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:57:01,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2018-10-02 11:57:01,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2018-10-02 11:57:01,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2018-10-02 11:57:01,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 439 transitions. [2018-10-02 11:57:01,092 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 439 transitions. Word has length 434 [2018-10-02 11:57:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:01,092 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 439 transitions. [2018-10-02 11:57:01,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-02 11:57:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 439 transitions. [2018-10-02 11:57:01,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2018-10-02 11:57:01,093 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:01,094 INFO L375 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 1, 1, 1, 1, 1, 1] [2018-10-02 11:57:01,094 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:01,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:01,094 INFO L82 PathProgramCache]: Analyzing trace with hash -557829564, now seen corresponding path program 108 times [2018-10-02 11:57:01,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:01,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:01,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:01,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:01,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-02 11:57:04,126 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:57:04,132 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:57:04,132 INFO L202 PluginConnector]: Adding new model Luxembourg-ArraysIntegefied.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:57:04 BoogieIcfgContainer [2018-10-02 11:57:04,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:57:04,133 INFO L168 Benchmark]: Toolchain (without parser) took 237277.96 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 75.0 MB). Free memory was 1.5 GB in the beginning and 952.3 MB in the end (delta: 504.9 MB). Peak memory consumption was 579.9 MB. Max. memory is 7.1 GB. [2018-10-02 11:57:04,134 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:57:04,135 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.63 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 11:57:04,135 INFO L168 Benchmark]: Boogie Preprocessor took 25.92 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 11:57:04,135 INFO L168 Benchmark]: RCFGBuilder took 393.50 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 11:57:04,136 INFO L168 Benchmark]: TraceAbstraction took 236805.55 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 75.0 MB). Free memory was 1.4 GB in the beginning and 952.3 MB in the end (delta: 483.8 MB). Peak memory consumption was 558.8 MB. Max. memory is 7.1 GB. [2018-10-02 11:57:04,137 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.92 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 393.50 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 236805.55 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 75.0 MB). Free memory was 1.4 GB in the beginning and 952.3 MB in the end (delta: 483.8 MB). Peak memory consumption was 558.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 41). Cancelled while BasicCegarLoop was analyzing trace of length 439 with TraceHistMax 108, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 89 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 236.7s OverallTime, 110 OverallIterations, 108 TraceHistogramMax, 27.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 981 SDtfs, 582 SDslu, 21211 SDs, 0 SdLazy, 9551 SolverSat, 193 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29643 GetRequests, 23756 SyntacticMatches, 0 SemanticMatches, 5887 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 177.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=439occurred in iteration=109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 109 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 8.0s SatisfiabilityAnalysisTime, 187.7s InterpolantComputationTime, 47520 NumberOfCodeBlocks, 47520 NumberOfCodeBlocksAsserted, 3150 NumberOfCheckSat, 47304 ConstructedInterpolants, 0 QuantifiedInterpolants, 41060932 SizeOfPredicates, 107 NumberOfNonLiveVariables, 35952 ConjunctsInSsa, 5992 ConjunctsInUnsatCore, 216 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1644804 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-ArraysIntegefied.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-57-04-146.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-ArraysIntegefied.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-57-04-146.csv Completed graceful shutdown