java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:56:39,635 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:56:39,637 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:56:39,653 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:56:39,654 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:56:39,655 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:56:39,656 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:56:39,658 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:56:39,660 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:56:39,660 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:56:39,661 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:56:39,685 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:56:39,711 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:56:39,712 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:56:39,713 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:56:39,713 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:56:39,714 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:56:39,714 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:56:39,715 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:56:39,715 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:56:39,715 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:56:39,715 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:56:39,717 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:56:39,717 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:56:39,717 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:56:39,717 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:56:39,717 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:56:39,718 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:56:39,718 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:56:39,718 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:56:39,718 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:56:39,720 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:56:39,720 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:56:39,720 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:56:39,720 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:56:39,720 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:56:39,721 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:56:39,721 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:56:39,721 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:56:39,721 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:56:39,722 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:56:39,722 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:56:39,796 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:56:39,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:56:39,819 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:56:39,821 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:56:39,822 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:56:39,823 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-09-30 23:56:39,823 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-09-30 23:56:39,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:56:39,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:56:39,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:56:39,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:56:39,885 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:56:39,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:56:39" (1/1) ... [2018-09-30 23:56:39,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:56:39" (1/1) ... [2018-09-30 23:56:39,923 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 23:56:39,923 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 23:56:39,923 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 23:56:39,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:56:39,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:56:39,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:56:39,926 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:56:39,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:56:39" (1/1) ... [2018-09-30 23:56:39,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:56:39" (1/1) ... [2018-09-30 23:56:39,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:56:39" (1/1) ... [2018-09-30 23:56:39,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:56:39" (1/1) ... [2018-09-30 23:56:39,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:56:39" (1/1) ... [2018-09-30 23:56:39,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:56:39" (1/1) ... [2018-09-30 23:56:39,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:56:39" (1/1) ... [2018-09-30 23:56:39,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:56:39,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:56:39,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:56:39,947 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:56:39,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:56:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:56:40,008 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 23:56:40,009 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 23:56:40,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 23:56:40,184 INFO L345 CfgBuilder]: Using library mode [2018-09-30 23:56:40,185 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:56:40 BoogieIcfgContainer [2018-09-30 23:56:40,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:56:40,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:56:40,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:56:40,190 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:56:40,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:56:39" (1/2) ... [2018-09-30 23:56:40,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d58c5aa and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:56:40, skipping insertion in model container [2018-09-30 23:56:40,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:56:40" (2/2) ... [2018-09-30 23:56:40,193 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-09-30 23:56:40,201 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:56:40,209 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:56:40,262 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:56:40,263 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:56:40,263 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:56:40,264 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:56:40,264 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:56:40,264 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:56:40,264 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:56:40,264 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:56:40,265 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:56:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 23:56:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 23:56:40,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:40,292 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 23:56:40,293 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:40,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:40,303 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-09-30 23:56:40,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:40,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:40,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:40,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:40,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:40,503 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:56:40,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:56:40,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:56:40,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:56:40,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:56:40,527 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 23:56:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:40,646 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-09-30 23:56:40,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:56:40,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 23:56:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:40,662 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:56:40,663 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:56:40,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:56:40,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:56:40,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-30 23:56:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 23:56:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-30 23:56:40,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-30 23:56:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:40,707 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-30 23:56:40,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:56:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-30 23:56:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:56:40,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:40,708 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 23:56:40,709 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:40,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:40,709 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-09-30 23:56:40,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:40,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:40,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:40,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:40,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:40,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:40,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:40,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:40,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:41,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:41,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:56:41,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:56:41,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:56:41,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:56:41,007 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-09-30 23:56:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:41,085 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-30 23:56:41,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:56:41,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-30 23:56:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:41,086 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:56:41,086 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:56:41,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:56:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:56:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-09-30 23:56:41,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:56:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 23:56:41,091 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-30 23:56:41,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:41,091 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 23:56:41,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:56:41,092 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 23:56:41,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:56:41,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:41,092 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 23:56:41,093 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:41,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:41,093 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-09-30 23:56:41,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:41,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:41,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:41,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:41,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:41,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:41,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:41,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:41,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:41,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:41,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:56:41,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:56:41,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:56:41,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:56:41,216 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-30 23:56:41,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:41,279 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-09-30 23:56:41,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:56:41,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-30 23:56:41,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:41,280 INFO L225 Difference]: With dead ends: 12 [2018-09-30 23:56:41,280 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:56:41,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:56:41,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:56:41,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-09-30 23:56:41,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:56:41,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-30 23:56:41,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-30 23:56:41,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:41,285 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-30 23:56:41,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:56:41,285 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-30 23:56:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:56:41,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:41,286 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-30 23:56:41,286 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:41,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:41,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-09-30 23:56:41,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:41,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:41,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:41,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:41,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:41,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:41,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:41,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:41,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:41,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:41,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:41,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:41,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:56:41,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:56:41,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:56:41,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:56:41,439 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-09-30 23:56:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:41,506 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-30 23:56:41,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:56:41,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 23:56:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:41,508 INFO L225 Difference]: With dead ends: 14 [2018-09-30 23:56:41,508 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:56:41,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:56:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:56:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-30 23:56:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:56:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-30 23:56:41,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-30 23:56:41,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:41,513 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-30 23:56:41,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:56:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-30 23:56:41,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:56:41,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:41,514 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 23:56:41,515 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:41,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:41,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-09-30 23:56:41,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:41,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:41,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:41,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:41,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:41,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:41,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:41,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:41,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:41,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:41,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:56:41,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:56:41,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:56:41,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:56:41,640 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-30 23:56:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:41,707 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-30 23:56:41,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:56:41,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 23:56:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:41,709 INFO L225 Difference]: With dead ends: 14 [2018-09-30 23:56:41,709 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:56:41,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:56:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:56:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-30 23:56:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:56:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-30 23:56:41,714 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-30 23:56:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:41,714 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-30 23:56:41,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:56:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-30 23:56:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:56:41,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:41,715 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 23:56:41,716 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:41,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:41,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-09-30 23:56:41,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:41,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:41,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:41,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:41,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:41,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:41,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:41,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:41,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:41,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:41,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:41,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:41,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:56:41,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:56:41,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:56:41,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:56:41,943 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-30 23:56:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:42,008 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-30 23:56:42,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:56:42,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 23:56:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:42,010 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:56:42,011 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:56:42,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:56:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:56:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-09-30 23:56:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:56:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 23:56:42,023 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-09-30 23:56:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:42,024 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 23:56:42,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:56:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 23:56:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:56:42,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:42,025 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-30 23:56:42,025 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:42,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:42,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-09-30 23:56:42,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:42,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:42,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:42,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:42,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:42,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:42,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:42,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:42,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:42,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:42,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:42,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:56:42,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:56:42,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:56:42,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:56:42,126 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-09-30 23:56:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:42,161 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-09-30 23:56:42,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:56:42,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-30 23:56:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:42,163 INFO L225 Difference]: With dead ends: 16 [2018-09-30 23:56:42,163 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 23:56:42,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:56:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 23:56:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-09-30 23:56:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:56:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-30 23:56:42,168 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-30 23:56:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:42,168 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-30 23:56:42,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:56:42,168 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-30 23:56:42,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:56:42,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:42,169 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-30 23:56:42,169 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:42,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:42,170 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-09-30 23:56:42,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:42,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:42,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:42,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:42,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:42,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:42,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:42,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:56:42,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:42,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:42,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:56:42,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:56:42,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:56:42,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:42,279 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-09-30 23:56:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:42,407 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-30 23:56:42,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:56:42,407 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 23:56:42,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:42,409 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:56:42,409 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:56:42,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:56:42,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-30 23:56:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:56:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 23:56:42,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-30 23:56:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:42,418 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 23:56:42,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:56:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 23:56:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:56:42,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:42,419 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 23:56:42,420 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:42,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:42,420 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-09-30 23:56:42,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:42,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:42,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:42,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:42,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:42,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:42,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:42,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:42,495 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:56:42,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:42,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:42,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:56:42,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:56:42,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:56:42,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:42,527 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-30 23:56:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:42,588 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-30 23:56:42,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:56:42,590 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 23:56:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:42,591 INFO L225 Difference]: With dead ends: 18 [2018-09-30 23:56:42,591 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:56:42,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:42,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:56:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-30 23:56:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:56:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 23:56:42,596 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-30 23:56:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:42,597 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 23:56:42,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:56:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 23:56:42,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:56:42,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:42,598 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 23:56:42,598 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:42,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:42,598 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-09-30 23:56:42,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:42,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:42,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:42,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:42,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:42,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:42,666 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:42,672 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:42,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:42,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:42,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:56:42,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:56:42,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:56:42,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:42,708 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-30 23:56:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:42,763 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-30 23:56:42,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:56:42,763 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 23:56:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:42,764 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:56:42,764 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:56:42,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:42,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:56:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-30 23:56:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:56:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 23:56:42,769 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-30 23:56:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:42,770 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 23:56:42,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:56:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 23:56:42,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:56:42,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:42,770 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 23:56:42,771 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:42,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:42,771 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-09-30 23:56:42,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:42,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:42,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:42,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:42,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:42,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:42,872 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:42,879 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:56:42,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:42,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:42,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:42,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:56:42,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:56:42,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:56:42,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:42,919 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-30 23:56:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:43,145 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-30 23:56:43,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:56:43,146 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 23:56:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:43,148 INFO L225 Difference]: With dead ends: 18 [2018-09-30 23:56:43,149 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:56:43,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:56:43,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-30 23:56:43,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:56:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 23:56:43,156 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-30 23:56:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:43,157 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 23:56:43,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:56:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 23:56:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:56:43,157 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:43,158 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 23:56:43,158 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:43,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:43,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-09-30 23:56:43,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:43,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:43,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:43,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:43,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:43,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:43,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:43,260 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:43,267 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 23:56:43,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:43,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:43,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:43,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:56:43,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:56:43,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:56:43,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:43,296 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-30 23:56:43,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:43,335 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 23:56:43,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:56:43,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 23:56:43,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:43,336 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:56:43,336 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:56:43,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:56:43,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-09-30 23:56:43,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:56:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 23:56:43,343 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-30 23:56:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:43,343 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 23:56:43,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:56:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 23:56:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:56:43,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:43,344 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 23:56:43,345 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:43,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:43,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-09-30 23:56:43,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:43,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:43,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:43,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:43,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:43,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:43,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:43,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:43,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:43,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:43,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:56:43,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:56:43,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:56:43,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:43,440 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-30 23:56:43,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:43,481 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 23:56:43,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:56:43,482 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 23:56:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:43,483 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:56:43,483 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:56:43,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:56:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-09-30 23:56:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:56:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 23:56:43,488 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-30 23:56:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:43,489 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 23:56:43,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:56:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 23:56:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:56:43,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:43,490 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-30 23:56:43,490 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:43,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:43,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-09-30 23:56:43,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:43,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:43,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:43,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:43,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:43,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:43,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:43,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:43,562 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:43,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:43,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:43,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:43,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:56:43,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:56:43,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:56:43,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:43,589 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-30 23:56:43,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:43,640 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-09-30 23:56:43,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:56:43,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 23:56:43,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:43,645 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:56:43,645 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:56:43,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:43,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:56:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-09-30 23:56:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:56:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 23:56:43,652 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-30 23:56:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:43,652 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 23:56:43,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:56:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 23:56:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:56:43,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:43,653 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-30 23:56:43,653 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:43,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:43,654 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-09-30 23:56:43,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:43,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:43,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:43,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:43,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:43,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:43,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 23:56:43,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:43,719 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:56:43,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:43,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:43,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:43,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:43,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:56:43,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:56:43,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:56:43,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:43,746 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-30 23:56:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:43,807 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-09-30 23:56:43,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:56:43,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-30 23:56:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:43,809 INFO L225 Difference]: With dead ends: 20 [2018-09-30 23:56:43,809 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 23:56:43,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:56:43,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 23:56:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-09-30 23:56:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:56:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-30 23:56:43,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-30 23:56:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:43,815 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-30 23:56:43,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:56:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-30 23:56:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:43,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:43,816 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-30 23:56:43,816 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:43,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:43,817 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-09-30 23:56:43,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:43,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:43,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:43,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:43,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:43,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:43,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:43,931 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:43,957 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:43,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:43,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:43,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:43,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:43,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:43,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:43,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:43,995 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-09-30 23:56:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:44,218 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 23:56:44,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:44,218 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:44,219 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:56:44,219 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:56:44,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:56:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-30 23:56:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:56:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 23:56:44,229 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 23:56:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:44,230 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 23:56:44,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 23:56:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:44,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:44,231 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 23:56:44,231 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:44,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:44,232 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-09-30 23:56:44,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:44,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:44,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:44,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:44,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:44,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:44,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:44,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:44,318 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 23:56:44,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:44,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:44,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:44,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:44,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:44,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:44,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:44,346 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 23:56:44,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:44,382 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 23:56:44,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:44,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:44,383 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:56:44,384 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:56:44,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:44,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:56:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-30 23:56:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:56:44,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 23:56:44,391 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-30 23:56:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:44,392 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 23:56:44,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:44,392 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 23:56:44,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:44,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:44,393 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 23:56:44,393 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:44,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-09-30 23:56:44,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:44,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:44,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:44,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:44,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:44,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:44,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:44,515 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:44,533 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:44,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:44,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:44,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:44,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:44,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:44,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:44,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:44,559 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-30 23:56:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:44,628 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 23:56:44,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:44,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:44,630 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:56:44,630 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:56:44,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:56:44,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-30 23:56:44,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:56:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 23:56:44,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 23:56:44,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:44,639 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 23:56:44,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 23:56:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:44,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:44,640 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 23:56:44,641 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:44,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:44,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-09-30 23:56:44,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:44,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:44,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:44,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:44,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:44,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:44,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:44,801 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:44,811 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 23:56:44,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:44,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:44,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:44,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:44,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:44,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:44,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:44,845 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 23:56:45,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:45,024 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-30 23:56:45,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:45,025 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:45,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:45,025 INFO L225 Difference]: With dead ends: 22 [2018-09-30 23:56:45,025 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 23:56:45,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 23:56:45,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-30 23:56:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:56:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 23:56:45,034 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-30 23:56:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:45,034 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 23:56:45,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 23:56:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:45,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:45,035 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 23:56:45,036 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:45,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:45,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-09-30 23:56:45,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:45,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:45,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:45,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:45,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:45,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:45,205 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:45,214 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:45,220 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 23:56:45,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:45,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:45,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:45,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:45,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:45,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:45,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:45,260 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-30 23:56:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:45,383 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 23:56:45,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:45,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:45,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:45,384 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:56:45,384 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:56:45,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:56:45,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-30 23:56:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:56:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 23:56:45,391 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 23:56:45,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:45,392 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 23:56:45,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 23:56:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:45,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:45,392 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 23:56:45,393 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:45,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:45,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-09-30 23:56:45,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:45,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:45,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:45,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:45,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:45,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:45,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:45,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:45,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:45,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:45,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:45,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:45,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:45,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:45,525 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 23:56:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:45,752 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 23:56:45,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:45,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:45,753 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:56:45,753 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:56:45,754 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:56:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-30 23:56:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:56:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 23:56:45,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-30 23:56:45,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:45,762 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 23:56:45,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:45,762 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 23:56:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:45,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:45,763 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 23:56:45,763 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:45,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:45,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-09-30 23:56:45,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:45,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:45,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:45,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:45,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:45,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:45,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:45,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:45,965 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:45,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:45,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:45,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:45,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:45,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:45,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:45,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:45,991 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-30 23:56:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:46,034 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-30 23:56:46,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:46,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:46,036 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:56:46,036 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:56:46,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:56:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-30 23:56:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:56:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 23:56:46,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 23:56:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:46,044 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 23:56:46,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:46,045 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 23:56:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:46,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:46,045 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 23:56:46,045 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:46,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:46,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-09-30 23:56:46,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:46,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:46,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:46,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:46,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:46,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:46,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:46,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:46,169 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 23:56:46,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:46,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:46,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:46,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:46,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:46,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:46,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:46,195 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 23:56:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:46,431 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-30 23:56:46,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:46,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:46,432 INFO L225 Difference]: With dead ends: 22 [2018-09-30 23:56:46,432 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 23:56:46,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:46,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 23:56:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-30 23:56:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:56:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 23:56:46,444 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-30 23:56:46,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:46,444 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 23:56:46,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 23:56:46,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:46,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:46,445 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 23:56:46,446 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:46,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:46,446 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-09-30 23:56:46,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:46,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:46,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:46,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:46,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:46,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:46,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:46,824 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:46,836 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:46,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:46,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:46,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:46,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:46,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:46,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:46,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:46,860 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-30 23:56:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:46,909 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 23:56:46,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:46,909 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:46,910 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:56:46,910 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:56:46,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:56:46,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 23:56:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:56:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:56:46,921 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 23:56:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:46,921 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:56:46,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:46,921 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:56:46,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:46,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:46,922 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 23:56:46,922 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:46,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:46,922 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-09-30 23:56:46,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:46,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:46,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:46,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:46,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:46,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:46,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:46,999 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:47,010 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-30 23:56:47,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:47,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:47,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:47,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:47,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:47,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:47,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:47,038 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 23:56:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:47,162 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 23:56:47,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:47,163 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:47,163 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:56:47,163 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:56:47,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:56:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-09-30 23:56:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:56:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 23:56:47,175 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 23:56:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:47,176 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 23:56:47,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 23:56:47,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:47,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:47,176 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 23:56:47,177 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:47,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:47,177 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-09-30 23:56:47,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:47,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:47,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:47,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:47,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:47,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:47,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:47,269 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:47,279 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 23:56:47,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:47,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:47,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:47,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:47,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:47,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:47,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:47,315 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 23:56:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:47,378 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 23:56:47,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:47,379 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:47,379 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:56:47,379 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:56:47,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:56:47,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 23:56:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:56:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:56:47,389 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 23:56:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:47,390 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:56:47,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:56:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:47,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:47,390 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 23:56:47,391 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:47,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-09-30 23:56:47,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:47,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:47,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:47,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:47,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:47,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:47,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:47,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:47,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:47,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:47,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:47,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:47,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:47,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:47,489 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 23:56:47,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:47,594 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 23:56:47,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:47,594 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:47,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:47,594 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:56:47,595 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:56:47,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:47,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:56:47,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-09-30 23:56:47,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:56:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 23:56:47,601 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-30 23:56:47,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:47,601 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 23:56:47,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:47,601 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 23:56:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:47,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:47,602 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-30 23:56:47,602 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:47,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:47,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-09-30 23:56:47,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:47,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:47,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:47,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:47,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:47,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:47,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:47,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:47,707 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:47,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:47,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:47,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:47,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:47,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:47,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:47,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:47,739 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-30 23:56:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:47,782 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 23:56:47,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:47,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:47,783 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:56:47,783 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:56:47,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:56:47,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-09-30 23:56:47,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:56:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:56:47,795 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 23:56:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:47,795 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:56:47,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:56:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:47,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:47,796 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 23:56:47,796 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:47,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:47,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-09-30 23:56:47,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:47,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:47,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:47,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:47,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:47,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:47,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:47,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:47,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 23:56:47,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:47,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:47,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:47,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:47,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:47,894 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 23:56:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:47,948 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 23:56:47,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:47,948 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:47,949 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:56:47,949 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:56:47,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:47,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:56:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-09-30 23:56:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:56:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 23:56:47,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-30 23:56:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:47,959 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 23:56:47,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:47,959 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 23:56:47,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:47,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:47,960 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-30 23:56:47,960 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:47,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:47,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-09-30 23:56:47,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:47,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:47,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:47,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:47,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:48,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:48,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:48,016 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:48,021 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:48,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:48,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:48,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:48,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:48,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:48,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:48,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:48,053 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-30 23:56:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:48,105 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-30 23:56:48,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:48,105 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:48,105 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:56:48,105 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:56:48,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:56:48,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-09-30 23:56:48,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:56:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:56:48,114 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-30 23:56:48,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:48,114 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:56:48,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:48,114 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:56:48,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:56:48,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:48,115 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-30 23:56:48,115 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:48,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:48,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-09-30 23:56:48,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:48,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:48,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:48,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:48,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:48,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:48,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:48,185 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:48,191 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:48,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:48,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:48,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:48,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:56:48,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:56:48,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:56:48,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:48,218 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-30 23:56:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:48,265 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-09-30 23:56:48,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:56:48,265 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-30 23:56:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:48,266 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:56:48,266 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 23:56:48,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:56:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 23:56:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-09-30 23:56:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:56:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-30 23:56:48,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-30 23:56:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:48,275 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-30 23:56:48,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:56:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-30 23:56:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:48,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:48,275 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-30 23:56:48,276 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:48,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:48,276 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-09-30 23:56:48,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:48,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:48,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:48,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:48,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:48,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:48,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:48,548 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:48,623 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:56:48,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:48,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:48,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:48,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:48,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:48,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:48,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:48,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:48,666 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-09-30 23:56:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:48,828 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 23:56:48,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:48,828 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:48,828 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:56:48,828 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:56:48,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:56:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 23:56:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:48,843 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 23:56:48,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:48,843 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:48,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:48,843 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:48,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:48,844 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 23:56:48,844 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:48,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:48,844 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-09-30 23:56:48,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:48,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:48,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:48,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:48,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:48,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:48,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:48,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:48,894 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:48,909 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:56:48,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:48,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:48,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:48,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:48,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:48,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:48,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:48,938 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 23:56:48,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:48,987 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 23:56:48,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:48,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:48,988 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:56:48,988 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:56:48,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:56:49,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 23:56:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:56:49,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:56:49,002 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 23:56:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:49,002 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:56:49,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:56:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:49,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:49,003 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 23:56:49,003 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:49,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:49,003 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-09-30 23:56:49,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:49,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:49,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:49,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:49,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:49,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:49,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:49,103 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:49,110 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 23:56:49,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:49,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:49,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:49,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:49,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:49,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:49,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:49,140 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 23:56:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:49,187 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 23:56:49,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:49,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:49,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:49,188 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:56:49,188 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:56:49,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:56:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 23:56:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:49,202 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 23:56:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:49,202 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:49,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:49,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:49,202 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:49,203 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:49,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:49,203 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-09-30 23:56:49,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:49,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:49,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:49,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:49,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:49,263 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:49,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:49,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:49,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:49,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:49,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:49,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:49,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:49,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:49,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:49,331 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 23:56:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:49,407 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 23:56:49,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:49,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:49,408 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:56:49,408 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:56:49,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:49,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:56:49,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-30 23:56:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:56:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 23:56:49,421 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-30 23:56:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:49,421 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 23:56:49,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 23:56:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:49,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:49,422 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 23:56:49,422 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:49,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-09-30 23:56:49,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:49,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:49,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:49,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:49,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:49,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:49,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:49,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:49,505 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:49,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:49,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:49,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:49,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:49,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:49,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:49,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:49,529 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-30 23:56:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:49,583 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 23:56:49,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:49,583 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:49,584 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:56:49,584 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:56:49,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:56:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-30 23:56:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:49,596 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 23:56:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:49,596 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:49,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:49,596 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:49,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:49,597 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:49,597 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:49,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-09-30 23:56:49,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:49,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:49,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:49,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:49,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:49,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:49,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:49,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:49,665 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:56:49,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:49,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:49,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:49,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:49,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:49,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:49,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:49,692 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 23:56:49,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:49,730 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 23:56:49,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:49,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:49,731 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:56:49,731 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:56:49,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:56:49,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-30 23:56:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:56:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:56:49,745 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 23:56:49,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:49,745 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:56:49,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:56:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:49,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:49,746 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:49,746 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:49,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:49,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-09-30 23:56:49,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:49,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:49,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:49,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:49,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:49,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:49,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:49,857 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:49,862 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:49,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:49,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:49,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:49,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:49,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:49,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:49,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:49,889 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 23:56:49,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:49,942 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 23:56:49,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:49,942 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:49,943 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:56:49,943 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:56:49,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:49,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:56:49,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-30 23:56:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:49,957 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 23:56:49,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:49,957 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:49,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:49,958 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:49,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:49,958 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:49,958 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:49,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:49,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-09-30 23:56:49,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:49,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:49,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:49,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:49,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:50,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:50,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:50,026 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:50,036 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:56:50,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:50,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:50,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:50,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:50,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:50,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:50,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:50,065 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 23:56:50,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:50,106 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-30 23:56:50,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:50,106 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:50,107 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:56:50,107 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:56:50,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:50,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:56:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-30 23:56:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:56:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 23:56:50,119 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-30 23:56:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:50,119 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 23:56:50,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:50,119 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 23:56:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:50,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:50,119 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 23:56:50,120 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:50,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:50,120 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-09-30 23:56:50,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:50,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:50,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:50,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:50,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:50,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:50,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:50,265 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:50,271 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 23:56:50,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:50,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:50,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:50,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:50,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:50,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:50,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:50,302 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-30 23:56:50,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:50,354 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 23:56:50,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:50,354 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:50,354 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:56:50,355 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:56:50,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:50,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:56:50,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 23:56:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:50,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:50,372 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 23:56:50,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:50,372 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:50,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:50,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:50,372 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:50,373 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:50,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:50,373 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-09-30 23:56:50,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:50,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:50,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:50,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:50,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:50,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:50,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:50,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:50,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:50,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:50,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:50,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:50,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:50,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:50,557 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 23:56:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:50,602 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 23:56:50,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:50,602 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:50,602 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:56:50,603 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:56:50,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:56:50,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-30 23:56:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:56:50,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:56:50,618 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 23:56:50,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:50,619 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:56:50,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:50,619 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:56:50,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:50,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:50,619 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:50,620 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:50,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:50,620 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-09-30 23:56:50,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:50,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:50,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:50,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:50,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:50,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:50,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:50,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:50,691 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:50,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:50,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:50,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:50,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:50,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:50,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:50,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:50,718 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 23:56:50,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:50,769 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 23:56:50,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:50,769 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:50,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:50,770 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:56:50,770 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:56:50,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:50,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:56:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 23:56:50,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:50,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 23:56:50,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:50,795 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:50,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:50,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:50,796 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:50,796 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:50,796 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:50,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:50,796 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-09-30 23:56:50,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:50,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:50,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:50,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:50,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:50,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:50,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:50,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:50,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:56:50,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:50,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:50,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:50,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:50,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:50,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:50,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:50,911 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 23:56:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:51,001 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 23:56:51,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:51,001 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:51,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:51,002 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:56:51,002 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:56:51,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:56:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-30 23:56:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:56:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 23:56:51,019 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-30 23:56:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:51,019 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 23:56:51,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 23:56:51,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:51,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:51,020 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:51,020 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:51,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:51,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-09-30 23:56:51,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:51,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:51,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:51,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:51,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:51,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:51,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:51,259 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:51,263 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:51,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:51,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:51,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:51,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:51,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:51,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:51,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:51,289 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-30 23:56:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:51,326 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 23:56:51,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:51,327 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:51,327 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:56:51,327 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:56:51,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:56:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-30 23:56:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:51,342 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 23:56:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:51,342 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:51,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:51,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:51,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:51,342 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:51,342 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:51,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:51,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-09-30 23:56:51,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:51,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:51,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:51,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:51,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:51,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:51,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:51,451 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:51,458 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:56:51,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:51,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:51,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:51,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:51,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:51,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:51,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:51,483 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 23:56:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:51,519 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 23:56:51,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:51,519 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:51,520 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:56:51,520 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:56:51,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:56:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-30 23:56:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:56:51,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:56:51,535 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 23:56:51,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:51,535 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:56:51,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:51,535 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:56:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:51,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:51,536 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:51,536 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:51,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:51,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-09-30 23:56:51,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:51,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:51,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:51,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:51,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:51,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:51,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:51,634 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:51,640 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 23:56:51,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:51,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:51,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:51,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:51,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:51,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:51,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:51,675 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 23:56:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:51,718 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-30 23:56:51,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:51,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:51,720 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:56:51,720 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:56:51,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:56:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-30 23:56:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:51,736 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 23:56:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:51,737 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:51,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:51,737 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:51,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:51,737 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 23:56:51,737 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:51,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:51,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-09-30 23:56:51,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:51,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:51,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:51,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:51,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:51,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:51,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:51,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:51,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:51,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:51,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:51,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:51,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:51,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:51,825 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 23:56:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:51,880 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-30 23:56:51,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:51,880 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:51,880 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:56:51,881 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:56:51,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:56:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-30 23:56:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:56:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 23:56:51,893 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-30 23:56:51,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:51,893 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 23:56:51,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 23:56:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:51,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:51,894 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 23:56:51,894 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:51,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:51,894 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-09-30 23:56:51,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:51,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:51,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:51,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:51,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:52,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:52,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:52,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:52,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:52,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:52,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:52,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:52,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:52,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:52,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:52,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:52,466 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-30 23:56:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:52,568 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:56:52,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:52,568 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:52,569 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:56:52,569 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:56:52,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:52,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:56:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-30 23:56:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:56:52,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:56:52,589 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 23:56:52,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:52,589 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:56:52,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:52,589 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:56:52,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:52,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:52,590 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:52,590 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:52,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:52,590 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-09-30 23:56:52,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:52,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:52,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:52,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:52,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:52,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:52,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:52,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:52,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:56:52,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:52,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:52,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:52,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:52,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:52,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:52,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:52,680 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 23:56:52,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:52,896 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:56:52,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:52,896 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:52,897 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:56:52,897 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:56:52,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:56:52,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-30 23:56:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:52,915 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 23:56:52,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:52,915 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:52,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:52,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:52,916 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:52,916 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:52,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:52,916 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-09-30 23:56:52,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:52,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:52,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:52,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:52,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:52,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:52,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:52,978 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:52,982 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:52,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:52,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:53,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:53,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:53,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:53,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:53,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:53,008 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 23:56:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:53,062 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:56:53,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:53,063 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:53,063 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:56:53,063 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:56:53,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:53,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:56:53,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-30 23:56:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:56:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:56:53,084 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 23:56:53,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:53,084 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:56:53,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:56:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:53,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:53,085 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:53,085 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:53,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:53,086 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-09-30 23:56:53,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:53,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:53,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:53,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:53,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:53,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:53,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:53,175 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:53,181 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:56:53,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:53,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:53,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:53,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:53,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:53,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:53,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:53,207 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 23:56:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:53,277 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 23:56:53,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:53,277 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:53,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:53,278 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:56:53,278 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:56:53,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:56:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-09-30 23:56:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:56:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:56:53,296 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 23:56:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:53,296 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:56:53,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:56:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:53,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:53,296 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:53,297 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:53,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:53,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-09-30 23:56:53,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:53,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:53,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:53,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:53,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:53,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:53,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:53,356 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:53,363 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 23:56:53,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:53,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:53,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:53,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:53,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:53,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:53,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:53,390 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 23:56:53,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:53,558 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:56:53,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:53,558 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:53,559 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:56:53,559 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:56:53,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:56:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-30 23:56:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:56:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:56:53,579 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 23:56:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:53,579 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:56:53,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:56:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:53,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:53,580 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:53,580 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:53,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:53,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-09-30 23:56:53,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:53,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:53,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:53,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:53,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:53,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:53,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:53,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:53,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:53,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:53,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:53,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:53,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:53,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:53,726 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 23:56:53,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:53,810 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:56:53,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:53,810 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:53,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:53,810 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:56:53,810 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:56:53,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:53,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:56:53,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-30 23:56:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:53,829 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 23:56:53,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:53,830 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:53,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:53,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:53,830 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:53,830 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:53,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:53,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-09-30 23:56:53,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:53,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:53,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:53,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:53,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:53,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:53,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:53,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:53,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:53,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:53,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:53,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:53,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:53,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:53,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:53,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:53,907 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 23:56:53,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:54,000 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:56:54,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:54,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:54,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:54,001 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:56:54,001 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:56:54,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:56:54,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-30 23:56:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:56:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:56:54,023 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 23:56:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:54,023 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:56:54,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:56:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:54,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:54,024 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 23:56:54,024 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:54,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-09-30 23:56:54,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:54,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:54,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:54,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:54,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:54,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:54,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:54,116 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:54,123 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:56:54,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:54,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:54,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:54,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:54,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:54,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:54,153 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 23:56:54,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:54,214 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 23:56:54,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:54,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:54,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:54,215 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:56:54,215 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:56:54,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:56:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-09-30 23:56:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:56:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 23:56:54,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-30 23:56:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:54,233 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 23:56:54,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:54,233 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 23:56:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:54,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:54,233 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:54,233 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:54,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:54,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-09-30 23:56:54,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:54,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:54,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:54,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:54,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:54,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:54,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:54,307 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:54,312 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:54,313 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:54,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:54,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:54,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:54,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:54,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:54,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:54,337 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-30 23:56:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:54,394 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 23:56:54,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:54,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:54,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:54,395 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:56:54,395 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:56:54,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:56:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 23:56:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:56:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:56:54,421 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 23:56:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:54,421 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:56:54,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:56:54,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:54,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:54,421 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:54,421 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:54,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:54,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-09-30 23:56:54,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:54,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:54,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:54,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:54,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:54,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:54,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:54,477 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:54,484 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:56:54,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:54,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:54,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:54,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:54,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:54,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:54,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:54,509 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 23:56:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:54,579 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 23:56:54,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:54,579 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:54,580 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:56:54,580 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:56:54,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:56:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-30 23:56:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:54,608 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 23:56:54,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:54,609 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:54,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:54,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:54,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:54,609 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:54,610 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:54,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:54,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-09-30 23:56:54,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:54,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:54,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:54,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:54,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:54,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:54,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:54,675 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:54,682 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-30 23:56:54,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:54,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:54,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:54,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:54,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:54,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:54,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:54,707 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 23:56:54,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:54,782 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 23:56:54,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:54,783 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:54,783 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:56:54,783 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:56:54,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:54,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:56:54,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 23:56:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:56:54,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:56:54,806 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 23:56:54,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:54,806 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:56:54,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:54,806 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:56:54,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:54,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:54,807 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 23:56:54,807 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:54,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:54,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-09-30 23:56:54,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:54,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:54,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:54,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:54,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:54,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:54,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:54,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:54,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:54,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:54,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:54,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:54,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:54,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:54,904 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 23:56:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:54,998 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 23:56:54,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:54,998 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:54,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:54,999 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:56:54,999 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:56:54,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:56:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-09-30 23:56:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:56:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:56:55,023 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-30 23:56:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:55,023 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:56:55,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:56:55,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:55,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:55,024 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-30 23:56:55,024 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:55,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:55,024 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-09-30 23:56:55,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:55,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:55,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:55,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:55,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:55,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:55,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:55,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:55,088 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:55,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:55,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:55,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:55,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:55,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:55,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:55,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:55,118 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-30 23:56:55,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:55,198 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 23:56:55,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:55,198 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:55,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:55,198 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:56:55,199 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:56:55,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:55,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:56:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-09-30 23:56:55,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:56:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:56:55,225 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 23:56:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:55,225 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:56:55,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:55,226 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:56:55,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:55,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:55,226 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 23:56:55,226 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:55,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:55,227 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-09-30 23:56:55,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:55,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:55,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:55,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:55,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:55,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:55,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:55,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:55,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:56:55,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:55,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:55,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:55,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:55,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:55,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:55,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:55,320 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 23:56:55,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:55,391 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 23:56:55,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:55,391 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:55,392 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:56:55,392 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:56:55,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:55,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:56:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-30 23:56:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:55,418 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-30 23:56:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:55,418 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:55,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:55,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:55,419 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-30 23:56:55,419 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:55,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:55,420 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-09-30 23:56:55,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:55,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:55,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:55,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:55,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:55,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:55,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:55,482 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:55,488 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:55,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:55,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:55,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:55,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:55,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:55,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:55,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:55,513 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-30 23:56:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:55,571 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-30 23:56:55,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:55,571 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:55,571 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:56:55,571 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:56:55,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:56:55,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-30 23:56:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:56:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:56:55,593 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-30 23:56:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:55,594 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:56:55,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:56:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:56:55,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:55,594 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-30 23:56:55,594 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:55,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:55,594 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-09-30 23:56:55,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:55,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:55,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:55,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:55,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:55,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:55,640 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 [2018-09-30 23:56:55,649 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:55,655 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:56:55,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:55,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:55,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:55,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:56:55,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:56:55,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:56:55,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:55,680 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-30 23:56:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:55,737 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-09-30 23:56:55,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:56:55,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-30 23:56:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:55,738 INFO L225 Difference]: With dead ends: 28 [2018-09-30 23:56:55,738 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:56:55,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:56:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:56:55,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-09-30 23:56:55,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:56:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-30 23:56:55,755 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-30 23:56:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:55,756 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-30 23:56:55,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:56:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-30 23:56:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:55,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:55,756 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-30 23:56:55,756 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:55,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:55,757 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-09-30 23:56:55,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:55,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:55,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:55,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:55,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:55,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:55,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:55,831 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:55,841 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:56:55,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:55,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:55,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:55,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:55,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:55,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:55,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:55,870 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-09-30 23:56:55,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:55,963 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:56:55,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:55,963 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:55,964 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:56:55,964 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:56:55,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:56:55,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 23:56:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:56:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:56:55,996 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:56:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:55,996 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:56:55,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:56:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:55,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:55,997 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 23:56:55,997 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:55,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:55,997 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-09-30 23:56:55,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:55,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:55,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:55,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:55,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:56,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:56,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:56,077 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:56,084 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:56:56,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:56,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:56,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:56,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:56,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:56,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:56,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:56,111 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:56:56,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:56,196 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:56:56,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:56,196 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:56,197 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:56:56,197 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:56:56,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:56:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 23:56:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:56:56,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:56:56,228 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 23:56:56,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:56,228 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:56:56,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:56:56,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:56,228 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:56,229 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 23:56:56,229 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:56,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-09-30 23:56:56,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:56,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:56,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:56,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:56,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:56,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:56,287 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 [2018-09-30 23:56:56,296 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:56,305 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:56:56,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:56,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:56,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:56,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:56,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:56,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:56,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:56,330 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 23:56:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:56,437 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:56:56,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:56,438 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:56,438 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:56:56,438 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:56:56,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:56,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:56:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 23:56:56,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:56:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:56:56,469 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:56:56,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:56,469 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:56:56,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:56,469 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:56:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:56,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:56,469 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:56:56,470 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:56,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-09-30 23:56:56,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:56,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:56,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:56,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:56,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:56,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:56,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:56,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:56,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:56,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:56,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:56,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:56,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:56,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:56,565 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:56:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:56,739 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:56:56,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:56,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:56,740 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:56:56,740 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:56:56,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:56:56,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-30 23:56:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:56,769 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 23:56:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:56,769 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:56,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:56,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:56,769 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 23:56:56,770 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:56,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-09-30 23:56:56,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:56,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:56,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:56,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:56,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:56,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:56,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:56,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:56,866 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:56,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:56,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:56,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:56,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:56,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:56,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:56,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:56,891 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 23:56:56,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:56,990 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:56:56,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:56,990 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:56,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:56,991 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:56:56,991 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:56:56,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:56:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 23:56:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:56:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:56:57,026 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:56:57,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:57,027 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:56:57,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:57,027 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:56:57,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:57,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:57,027 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:56:57,028 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:57,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:57,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-09-30 23:56:57,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:57,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:57,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:57,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:57,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:57,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:57,121 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:57,128 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:57,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 23:56:57,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:57,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:57,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:57,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:57,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:57,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:57,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:57,161 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:56:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:57,247 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:56:57,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:57,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:57,247 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:56:57,247 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:56:57,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:56:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 23:56:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:56:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:56:57,279 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 23:56:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:57,279 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:56:57,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:56:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:57,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:57,280 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:56:57,280 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:57,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:57,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-09-30 23:56:57,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:57,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:57,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:57,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:57,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:57,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:57,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:57,350 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:57,379 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:57,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:57,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:57,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:57,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:57,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:57,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:57,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:57,403 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 23:56:57,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:57,497 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:56:57,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:57,497 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:57,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:57,498 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:56:57,498 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:56:57,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:57,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:56:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 23:56:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:56:57,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:56:57,532 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:56:57,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:57,532 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:56:57,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:57,532 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:56:57,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:57,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:57,532 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:56:57,532 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:57,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:57,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-09-30 23:56:57,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:57,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:57,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:57,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:57,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:57,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:57,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:57,639 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:57,649 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:56:57,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:57,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:57,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:57,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:57,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:57,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:57,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:57,680 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:56:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:57,773 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:56:57,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:57,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:57,774 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:56:57,774 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:56:57,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:56:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-30 23:56:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:56:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:56:57,799 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-30 23:56:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:57,799 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:56:57,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:56:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:57,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:57,799 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 23:56:57,799 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:57,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:57,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-09-30 23:56:57,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:57,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:57,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:57,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:57,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:57,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:57,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:57,858 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:57,865 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:56:57,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:57,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:57,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:57,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:57,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:57,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:57,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:57,894 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-30 23:56:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:57,985 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:56:57,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:57,986 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:57,986 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:56:57,986 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:56:57,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:57,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:56:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 23:56:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:56:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:56:58,023 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:56:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:58,023 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:56:58,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:56:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:58,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:58,024 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:56:58,024 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:58,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-09-30 23:56:58,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:58,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:58,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:58,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:58,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:58,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:58,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:58,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:58,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:58,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:58,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:58,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:58,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:58,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:58,140 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:56:58,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:58,223 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 23:56:58,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:58,223 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:58,224 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:56:58,224 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:56:58,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:58,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:56:58,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 23:56:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:56:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:56:58,259 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 23:56:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:58,259 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:56:58,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:58,260 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:56:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:58,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:58,260 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:56:58,260 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:58,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:58,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-09-30 23:56:58,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:58,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:58,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:58,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:58,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:58,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:58,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:58,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:56:58,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:56:58,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:58,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:58,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:58,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:58,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:58,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:58,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:58,422 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 23:56:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:58,521 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:56:58,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:58,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:58,522 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:56:58,522 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:56:58,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:58,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:56:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 23:56:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:56:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:56:58,558 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:56:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:58,558 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:56:58,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:56:58,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:58,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:58,559 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:56:58,559 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:58,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:58,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-09-30 23:56:58,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:58,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:58,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:58,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:58,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:58,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:58,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:58,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:56:58,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 23:56:58,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:58,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:58,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:58,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:58,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:58,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:58,720 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:56:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:58,817 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 23:56:58,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:58,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:58,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:58,818 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:56:58,818 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:56:58,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:56:58,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-30 23:56:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:56:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:56:58,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 23:56:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:58,852 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:56:58,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:56:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:58,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:58,853 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:56:58,853 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:58,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:58,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-09-30 23:56:58,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:58,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:58,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:58,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:58,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:59,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:59,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:59,105 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:56:59,114 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:56:59,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:59,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:59,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:59,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:59,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:59,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:59,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:59,138 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 23:56:59,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:59,219 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 23:56:59,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:59,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:59,220 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:56:59,220 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:56:59,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:56:59,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-30 23:56:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:56:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:56:59,261 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:56:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:59,262 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:56:59,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:56:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:59,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:59,262 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:56:59,262 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:59,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:59,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-09-30 23:56:59,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:59,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:59,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:59,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:59,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:59,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:59,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:59,373 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:56:59,380 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:56:59,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:59,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:59,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:59,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:59,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:59,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:59,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:59,414 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:56:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:59,488 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 23:56:59,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:59,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:59,489 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:56:59,489 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:56:59,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:56:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-30 23:56:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:56:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:56:59,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 23:56:59,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:59,525 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:56:59,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:59,525 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:56:59,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:59,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:59,525 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:56:59,525 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:59,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:59,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-09-30 23:56:59,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:59,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:59,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:59,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:59,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:59,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:59,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:59,593 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:56:59,600 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:56:59,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:56:59,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:59,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:59,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:59,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:59,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:59,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:59,625 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 23:56:59,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:59,699 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 23:56:59,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:59,699 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:59,700 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:56:59,700 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:56:59,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:56:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-30 23:56:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:56:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:56:59,737 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:56:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:59,737 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:56:59,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:56:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:59,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:59,737 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:56:59,738 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:59,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:59,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-09-30 23:56:59,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:59,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:59,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:59,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:56:59,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:59,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:56:59,788 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:56:59,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:56:59,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:56:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:56:59,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:56:59,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:56:59,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:56:59,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:56:59,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:59,825 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:56:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:56:59,900 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-30 23:56:59,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:56:59,900 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:56:59,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:56:59,901 INFO L225 Difference]: With dead ends: 30 [2018-09-30 23:56:59,901 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 23:56:59,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:56:59,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 23:56:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-30 23:56:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:56:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 23:56:59,924 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-30 23:56:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:56:59,925 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 23:56:59,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:56:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 23:56:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:56:59,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:56:59,925 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 23:56:59,925 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:56:59,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:56:59,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-09-30 23:56:59,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:56:59,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:56:59,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:59,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:56:59,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:56:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:00,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:00,000 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:00,007 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:00,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:00,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:00,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:00,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:00,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:00,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:00,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:00,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:00,041 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-30 23:57:00,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:00,148 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:00,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:00,148 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:00,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:00,148 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:00,148 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:00,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:00,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 23:57:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:00,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:00,191 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:00,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:00,192 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:00,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:00,192 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:00,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:00,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:00,192 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:00,193 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:00,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:00,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-09-30 23:57:00,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:00,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:00,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:00,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:00,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:00,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:00,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:00,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:00,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 23:57:00,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:00,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:00,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:00,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:00,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:00,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:00,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:00,734 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:00,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:00,843 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:00,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:00,844 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:00,844 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:00,844 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:00,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 23:57:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:57:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:57:00,884 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 23:57:00,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:00,885 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:57:00,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:00,885 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:57:00,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:00,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:00,885 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:00,885 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:00,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:00,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-09-30 23:57:00,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:00,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:00,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:00,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:00,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:00,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:00,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:00,953 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:00,958 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:00,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:00,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:00,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:00,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:00,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:00,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:00,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:00,981 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 23:57:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:01,083 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:57:01,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:01,083 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:01,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:01,084 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:57:01,084 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:57:01,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:57:01,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 23:57:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:01,128 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:01,128 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:01,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:01,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:01,128 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:01,128 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:01,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-09-30 23:57:01,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:01,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:01,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:01,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:01,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:01,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:01,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:01,201 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:01,212 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:57:01,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:01,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:01,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:01,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:01,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:01,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:01,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:01,237 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:01,358 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:57:01,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:01,358 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:01,358 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:57:01,358 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:57:01,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:01,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:57:01,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-30 23:57:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:57:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:57:01,396 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 23:57:01,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:01,396 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:57:01,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:57:01,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:01,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:01,396 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:01,397 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:01,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:01,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-09-30 23:57:01,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:01,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:01,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:01,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:01,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:01,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:01,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:01,487 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:01,495 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:57:01,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:01,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:01,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:01,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:01,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:01,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:01,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:01,519 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 23:57:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:01,634 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:01,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:01,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:01,634 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:01,634 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:01,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 23:57:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:01,678 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:01,679 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:01,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:01,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:01,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:01,679 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:01,679 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:01,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:01,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-09-30 23:57:01,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:01,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:01,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:01,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:01,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:01,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:01,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:01,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:01,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:01,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:01,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:01,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:01,808 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:01,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:01,921 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:01,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:01,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:01,922 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:01,922 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:01,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 23:57:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:57:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:57:01,965 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 23:57:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:01,965 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:57:01,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:57:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:01,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:01,966 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:01,966 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:01,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:01,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-09-30 23:57:01,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:01,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:01,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:01,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:01,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:02,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:02,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:02,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:02,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:02,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:02,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:02,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:02,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:02,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:02,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:02,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:02,064 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 23:57:02,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:02,171 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:57:02,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:02,171 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:02,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:02,172 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:57:02,172 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:57:02,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:02,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:57:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 23:57:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:02,215 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:02,215 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:02,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:02,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:02,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:02,216 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:02,216 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:02,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:02,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-09-30 23:57:02,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:02,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:02,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:02,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:02,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:02,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:02,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:02,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:02,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 23:57:02,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:02,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:02,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:02,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:02,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:02,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:02,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:02,329 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:02,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:02,429 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:57:02,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:02,429 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:02,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:02,430 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:57:02,430 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:57:02,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:57:02,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-30 23:57:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:57:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:57:02,463 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-30 23:57:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:02,464 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:57:02,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:02,464 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:57:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:02,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:02,464 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:02,464 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:02,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:02,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-09-30 23:57:02,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:02,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:02,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:02,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:02,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:02,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:02,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:02,659 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:02,664 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:02,664 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:02,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:02,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:02,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:02,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:02,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:02,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:02,688 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-30 23:57:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:02,782 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:57:02,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:02,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:02,782 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:57:02,783 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:57:02,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:57:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 23:57:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:02,830 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:02,830 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:02,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:02,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:02,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:02,830 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:02,831 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:02,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:02,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-09-30 23:57:02,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:02,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:02,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:02,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:02,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:02,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:02,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:02,900 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:02,909 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:57:02,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:02,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:02,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:02,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:02,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:02,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:02,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:02,935 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:03,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:03,043 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 23:57:03,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:03,043 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:03,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:03,044 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:57:03,044 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:57:03,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:03,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:57:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-30 23:57:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:57:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:57:03,090 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 23:57:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:03,090 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:57:03,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:57:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:03,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:03,090 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:03,090 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:03,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:03,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-09-30 23:57:03,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:03,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:03,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:03,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:03,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:03,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:03,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:03,155 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:03,162 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:57:03,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:03,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:03,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:03,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:03,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:03,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:03,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:03,187 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 23:57:03,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:03,297 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:57:03,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:03,297 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:03,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:03,298 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:57:03,298 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:57:03,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:03,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:57:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 23:57:03,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:03,370 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:03,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:03,370 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:03,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:03,370 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:03,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:03,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:03,371 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:03,371 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:03,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:03,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-09-30 23:57:03,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:03,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:03,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:03,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:03,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:03,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:03,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:03,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:03,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:03,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:03,509 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:03,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:03,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:03,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:03,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:03,510 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:03,616 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 23:57:03,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:03,616 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:03,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:03,617 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:57:03,617 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:57:03,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:03,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:57:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-30 23:57:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:57:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:57:03,660 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 23:57:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:03,660 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:57:03,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:03,660 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:57:03,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:03,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:03,669 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:03,669 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:03,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:03,670 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-09-30 23:57:03,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:03,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:03,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:03,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:03,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:03,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:03,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:03,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:03,764 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:03,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:03,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:03,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:03,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:03,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:03,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:03,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:03,789 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 23:57:03,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:03,884 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 23:57:03,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:03,884 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:03,884 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:57:03,885 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:57:03,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:57:03,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-30 23:57:03,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:03,929 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:03,929 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:03,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:03,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:03,930 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:03,930 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:03,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:03,930 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-09-30 23:57:03,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:03,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:03,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:03,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:03,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:04,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:04,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:04,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:04,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 23:57:04,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:04,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:04,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:04,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:04,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:04,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:04,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:04,055 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:04,146 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 23:57:04,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:04,146 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:04,146 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:57:04,147 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:57:04,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:57:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-30 23:57:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:57:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:57:04,190 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 23:57:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:04,190 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:57:04,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:57:04,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:04,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:04,190 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:04,190 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:04,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:04,191 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-09-30 23:57:04,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:04,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:04,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:04,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:04,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:04,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:04,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:04,246 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:04,251 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:04,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:04,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:04,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:04,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:04,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:04,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:04,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:04,276 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 23:57:04,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:04,367 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-30 23:57:04,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:04,368 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:04,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:04,368 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:57:04,369 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:57:04,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:04,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:57:04,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-30 23:57:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:04,418 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:04,418 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:04,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:04,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:04,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:04,419 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 23:57:04,419 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:04,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:04,419 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-09-30 23:57:04,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:04,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:04,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:04,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:04,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:04,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:04,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:04,487 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:04,494 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:57:04,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:04,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:04,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:04,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:04,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:04,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:04,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:04,519 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:04,608 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-30 23:57:04,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:04,608 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:04,608 INFO L225 Difference]: With dead ends: 30 [2018-09-30 23:57:04,608 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 23:57:04,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:04,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 23:57:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-30 23:57:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:57:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 23:57:04,640 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-30 23:57:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:04,640 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 23:57:04,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 23:57:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:04,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:04,641 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 23:57:04,641 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:04,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:04,641 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-09-30 23:57:04,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:04,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:04,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:04,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:04,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:04,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:04,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:04,705 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:04,713 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:57:04,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:04,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:04,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:04,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:04,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:04,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:04,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:04,738 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-30 23:57:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:04,885 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:57:04,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:04,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:04,886 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:57:04,886 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:57:04,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:04,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:57:04,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 23:57:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:04,943 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:04,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:04,944 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:04,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:04,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:04,944 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:04,945 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:04,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-09-30 23:57:04,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:04,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:04,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:04,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:04,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:05,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:05,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:05,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:05,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:05,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:05,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:05,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:05,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:05,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:05,040 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:05,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:05,176 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:57:05,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:05,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:05,176 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:57:05,176 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:57:05,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:57:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 23:57:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:05,229 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:05,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:05,230 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:05,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:05,230 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:05,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:05,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:05,230 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:05,230 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:05,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:05,231 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-09-30 23:57:05,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:05,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:05,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:05,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:05,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:05,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:05,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:05,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:05,332 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:05,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:05,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:05,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:05,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:05,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:05,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:05,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:05,356 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:05,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:05,520 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:57:05,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:05,520 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:05,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:05,521 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:57:05,521 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:57:05,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:57:05,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 23:57:05,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:05,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:05,579 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:05,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:05,579 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:05,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:05,579 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:05,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:05,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:05,580 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:05,580 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:05,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:05,580 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-09-30 23:57:05,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:05,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:05,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:05,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:05,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:05,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:05,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:05,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:05,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 23:57:05,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:05,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:05,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:05,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:05,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:05,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:05,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:05,699 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:05,904 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:57:05,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:05,905 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:05,905 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:57:05,905 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:57:05,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:57:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-30 23:57:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:57:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:57:05,987 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 23:57:05,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:05,987 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:57:05,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:57:05,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:05,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:05,988 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:05,988 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:05,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:05,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-09-30 23:57:05,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:05,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:05,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:05,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:05,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:06,768 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:06,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:06,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:06,783 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:06,814 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:06,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:06,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:06,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:06,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:06,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:06,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:06,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:06,855 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 23:57:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:07,351 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:07,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:07,351 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:07,352 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:07,352 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:07,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:07,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 23:57:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:07,408 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:07,408 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:07,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:07,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:07,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:07,409 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:07,409 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:07,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:07,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-09-30 23:57:07,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:07,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:07,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:07,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:07,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:07,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:07,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:07,474 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:07,483 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:57:07,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:07,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:07,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:07,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:07,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:07,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:07,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:07,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:07,518 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:07,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:07,694 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:07,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:07,694 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:07,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:07,695 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:07,695 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:07,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:07,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:07,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-30 23:57:07,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:07,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:07,758 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:07,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:07,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:07,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:07,758 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:07,758 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:07,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:07,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-09-30 23:57:07,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:07,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:07,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:07,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:07,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:07,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:07,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:07,858 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:07,865 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:57:07,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:07,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:07,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:07,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:07,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:07,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:07,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:07,889 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:08,031 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:08,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:08,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:08,032 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:08,032 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:08,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 23:57:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:08,090 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:08,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:08,091 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:08,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:08,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:08,091 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:08,091 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:08,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:08,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-09-30 23:57:08,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:08,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:08,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:08,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:08,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:08,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:08,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:08,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:08,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:08,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:08,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:08,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:08,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:08,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:08,262 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:08,393 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:08,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:08,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:08,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:08,393 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:08,394 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:08,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:08,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-09-30 23:57:08,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:57:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:57:08,444 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 23:57:08,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:08,445 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:57:08,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:57:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:08,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:08,445 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:08,445 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:08,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:08,446 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-09-30 23:57:08,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:08,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:08,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:08,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:08,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:08,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:08,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:08,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:08,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:08,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:08,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:08,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:08,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:08,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:08,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:08,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:08,557 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 23:57:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:08,765 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:57:08,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:08,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:08,765 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:57:08,765 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:57:08,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:57:08,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 23:57:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:08,827 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:08,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:08,827 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:08,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:08,828 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:08,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:08,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:08,828 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:08,828 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:08,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:08,828 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-09-30 23:57:08,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:08,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:08,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:08,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:08,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:08,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:08,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:08,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:08,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 23:57:08,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:08,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:08,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:08,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:08,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:08,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:08,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:08,992 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:09,198 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:57:09,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:09,198 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:09,199 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:57:09,199 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:57:09,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:57:09,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 23:57:09,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:09,295 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:09,296 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:09,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:09,296 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:09,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:09,296 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:09,297 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:09,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:09,297 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-09-30 23:57:09,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:09,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:09,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:09,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:09,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:09,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:09,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:09,511 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:09,516 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:09,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:09,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:09,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:09,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:09,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:09,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:09,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:09,541 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:09,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:09,684 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:57:09,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:09,684 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:09,684 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:57:09,684 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:57:09,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:57:09,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 23:57:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:09,746 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:09,746 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:09,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:09,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:09,746 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:09,747 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:09,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:09,747 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-09-30 23:57:09,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:09,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:09,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:09,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:09,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:10,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:10,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:10,018 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:10,025 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:57:10,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:10,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:10,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:10,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:10,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:10,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:10,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:10,051 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:10,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:10,194 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:57:10,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:10,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:10,195 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:57:10,195 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:57:10,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:10,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:57:10,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-30 23:57:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:57:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:57:10,249 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 23:57:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:10,249 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:57:10,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:57:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:10,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:10,250 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:10,250 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:10,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:10,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-09-30 23:57:10,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:10,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:10,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:10,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:10,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:10,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:10,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:10,373 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:10,381 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:57:10,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:10,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:10,385 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:10,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:10,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:10,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:10,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:10,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:10,405 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 23:57:10,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:10,541 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:10,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:10,541 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:10,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:10,541 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:10,541 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:10,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:10,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 23:57:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:10,603 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:10,603 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:10,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:10,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:10,603 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:10,603 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:10,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:10,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-09-30 23:57:10,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:10,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:10,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:10,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:10,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:10,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:10,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:10,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:10,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:10,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:10,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:10,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:10,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:10,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:10,743 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:10,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:10,884 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:10,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:10,884 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:10,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:10,885 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:10,885 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:10,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:10,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-30 23:57:10,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:10,945 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:10,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:10,945 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:10,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:10,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:10,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:10,945 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:10,946 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:10,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:10,946 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-09-30 23:57:10,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:10,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:10,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:10,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:10,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:11,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:11,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:11,030 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:11,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:11,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:11,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:11,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:11,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:11,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:11,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:11,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:11,061 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:11,200 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:11,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:11,200 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:11,201 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:11,201 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:11,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:11,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:11,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 23:57:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:11,264 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:11,264 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:11,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:11,264 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:11,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:11,265 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 23:57:11,265 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:11,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-09-30 23:57:11,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:11,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:11,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:11,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:11,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:11,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:11,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:11,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:11,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 23:57:11,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:11,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:11,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:11,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:11,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:11,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:11,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:11,414 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:11,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:11,533 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:11,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:11,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:11,534 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:11,534 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:11,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:11,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-09-30 23:57:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:57:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:57:11,577 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-30 23:57:11,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:11,577 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:57:11,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:11,577 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:57:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:11,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:11,577 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:11,578 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:11,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:11,578 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-09-30 23:57:11,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:11,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:11,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:11,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:11,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:11,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:11,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:11,643 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:11,649 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:11,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:11,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:11,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:11,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:11,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:11,676 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-30 23:57:11,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:11,888 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:11,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:11,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:11,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:11,888 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:11,888 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:11,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:11,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 23:57:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:11,955 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:11,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:11,956 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:11,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:11,956 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:11,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:11,956 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:11,956 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:11,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:11,957 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-09-30 23:57:11,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:11,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:11,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:11,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:11,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:12,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:12,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:12,025 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:12,034 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:57:12,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:12,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:12,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:12,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:12,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:12,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:12,060 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:12,206 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:12,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:12,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:12,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:12,207 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:12,207 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:12,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:12,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:12,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-30 23:57:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:12,272 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:12,272 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:12,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:12,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:12,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:12,273 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:12,273 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:12,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-09-30 23:57:12,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:12,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:12,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:12,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:12,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:12,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:12,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:12,337 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:12,345 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:57:12,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:12,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:12,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:12,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:12,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:12,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:12,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:12,370 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:12,522 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:12,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:12,522 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:12,523 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:12,523 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:12,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:12,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 23:57:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:12,599 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:12,599 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:12,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:12,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:12,600 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:12,600 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:12,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:12,600 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-09-30 23:57:12,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:12,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:12,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:12,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:12,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:12,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:12,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:12,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:12,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:12,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:12,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:12,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:12,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:12,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:12,693 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:12,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:12,830 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:57:12,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:12,830 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:12,831 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:57:12,831 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:57:12,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:12,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:57:12,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-30 23:57:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:57:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:57:12,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 23:57:12,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:12,908 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:57:12,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:12,908 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:57:12,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:12,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:12,908 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:12,908 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:12,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:12,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-09-30 23:57:12,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:12,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:12,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:12,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:12,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:12,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:12,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:12,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:12,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:12,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:12,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:12,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:12,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:12,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:12,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:12,999 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 23:57:13,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:13,161 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:13,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:13,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:13,162 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:13,162 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:13,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:13,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 23:57:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:13,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:13,233 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:13,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:13,233 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:13,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:13,233 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:13,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:13,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:13,233 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:13,234 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:13,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:13,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-09-30 23:57:13,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:13,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:13,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:13,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:13,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:13,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:13,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:13,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:13,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 23:57:13,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:13,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:13,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:13,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:13,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:13,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:13,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:13,328 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:13,486 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:13,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:13,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:13,486 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:13,486 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:13,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-30 23:57:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:13,553 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:13,553 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:13,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:13,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:13,553 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:13,554 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:13,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:13,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-09-30 23:57:13,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:13,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:13,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:13,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:13,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:13,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:13,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:13,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:13,636 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:13,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:13,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:13,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:13,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:13,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:13,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:13,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:13,660 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:13,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:13,800 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:13,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:13,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:13,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:13,801 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:13,801 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:13,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 23:57:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:13,873 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:13,874 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:13,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:13,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:13,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:13,874 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 23:57:13,874 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:13,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:13,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-09-30 23:57:13,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:13,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:13,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:13,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:13,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:13,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:13,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:13,992 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:14,006 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:57:14,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:14,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:14,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:14,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:14,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:14,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:14,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:14,039 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:14,565 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:57:14,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:14,565 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:14,566 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:57:14,566 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:57:14,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:57:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-30 23:57:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:57:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:57:14,661 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-30 23:57:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:14,661 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:57:14,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:57:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:14,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:14,662 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-30 23:57:14,662 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:14,662 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:14,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-09-30 23:57:14,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:14,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:14,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:14,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:14,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:15,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:15,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:15,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:15,457 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:57:15,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:15,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:15,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:15,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:15,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:15,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:15,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:15,481 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-30 23:57:15,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:15,607 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:57:15,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:15,607 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:15,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:15,608 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:57:15,608 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:57:15,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:15,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:57:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 23:57:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:15,681 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:15,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:15,681 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:15,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:15,681 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:15,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:15,682 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:15,682 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:15,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:15,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-09-30 23:57:15,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:15,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:15,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:15,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:15,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:15,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:15,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:15,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:15,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:15,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:15,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:15,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:15,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:15,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:15,980 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:16,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:16,102 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:57:16,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:16,102 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:16,103 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:57:16,103 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:57:16,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:57:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-30 23:57:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:16,177 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:16,177 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:16,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:16,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:16,177 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:16,178 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:16,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:16,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-09-30 23:57:16,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:16,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:16,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:16,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:16,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:16,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:16,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:16,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:16,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:16,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:16,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:16,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:16,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:16,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:16,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:16,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:16,273 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:16,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:16,456 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:57:16,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:16,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:16,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:16,457 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:57:16,457 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:57:16,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:16,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:57:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 23:57:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:16,525 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:16,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:16,525 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:16,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:16,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:16,526 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 23:57:16,526 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:16,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:16,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-09-30 23:57:16,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:16,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:16,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:16,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:16,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:16,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:16,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:16,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:16,638 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-30 23:57:16,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:16,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:16,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:16,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:16,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:16,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:16,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:16,663 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:16,790 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:57:16,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:16,790 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:16,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:16,791 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:57:16,791 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:57:16,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:57:16,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-30 23:57:16,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:57:16,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:57:16,885 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-30 23:57:16,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:16,885 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:57:16,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:57:16,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:16,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:16,886 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-30 23:57:16,886 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:16,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:16,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-09-30 23:57:16,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:16,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:16,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:16,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:16,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:17,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:17,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:17,204 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:17,208 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:17,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:17,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:17,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:17,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:17,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:17,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:17,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:17,233 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-30 23:57:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:17,352 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 23:57:17,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:17,352 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:17,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:17,353 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:57:17,353 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:57:17,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:17,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:57:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-09-30 23:57:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:17,428 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:17,429 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:17,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:17,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:17,429 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 23:57:17,429 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:17,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:17,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-09-30 23:57:17,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:17,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:17,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:17,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:17,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:17,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:17,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:17,497 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:17,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:57:17,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:17,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:17,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:17,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:17,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:17,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:17,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:17,529 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:17,667 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 23:57:17,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:17,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:17,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:17,668 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:57:17,668 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:57:17,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:17,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:57:17,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-09-30 23:57:17,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:17,742 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-30 23:57:17,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:17,742 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:17,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:17,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:17,743 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:17,743 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-30 23:57:17,743 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:17,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:17,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-09-30 23:57:17,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:17,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:17,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:17,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:17,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:18,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:18,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:18,502 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:18,599 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:57:18,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:18,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:18,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:18,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:18,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:18,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:18,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:18,637 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-30 23:57:18,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:18,924 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-30 23:57:18,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:18,924 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:18,924 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:57:18,924 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:57:18,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:18,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:57:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-09-30 23:57:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:19,000 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-30 23:57:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:19,001 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:19,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:57:19,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:19,001 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-30 23:57:19,001 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:19,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:19,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-09-30 23:57:19,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:19,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:19,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:19,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:19,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:19,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:19,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:19,060 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:19,071 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:57:19,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:19,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:19,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:19,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:57:19,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:57:19,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:57:19,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:19,101 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-30 23:57:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:19,241 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-09-30 23:57:19,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:57:19,242 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-30 23:57:19,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:19,242 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:57:19,242 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 23:57:19,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:57:19,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 23:57:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-09-30 23:57:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:57:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-30 23:57:19,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-30 23:57:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:19,336 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-30 23:57:19,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:57:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-30 23:57:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:19,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:19,337 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-30 23:57:19,338 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:19,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:19,338 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-09-30 23:57:19,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:19,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:19,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:19,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:19,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:19,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:19,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:19,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:19,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:19,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:19,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:19,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:19,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:19,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:19,568 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-09-30 23:57:19,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:19,782 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:57:19,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:19,783 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:19,783 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:57:19,784 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:57:19,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:57:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 23:57:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:19,876 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:19,876 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:19,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:19,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:19,877 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:57:19,877 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:19,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:19,878 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-09-30 23:57:19,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:19,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:19,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:19,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:19,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:19,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:19,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:19,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:19,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:20,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:20,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:20,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:20,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:20,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:20,024 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:20,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:20,232 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:57:20,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:20,232 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:20,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:20,233 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:57:20,233 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:57:20,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:57:20,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 23:57:20,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:20,325 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:20,325 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:20,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:20,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:20,326 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:57:20,327 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:20,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-09-30 23:57:20,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:20,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:20,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:20,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:20,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:20,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:20,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:20,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:20,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:20,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:20,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:20,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:20,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:20,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:20,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:20,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:20,435 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:20,665 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:57:20,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:20,665 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:20,666 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:57:20,666 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:57:20,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:20,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:57:20,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 23:57:20,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:20,760 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:20,760 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:20,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:20,760 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:20,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:20,760 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:20,761 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:20,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:20,761 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-09-30 23:57:20,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:20,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:20,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:20,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:20,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:20,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:20,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:20,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:20,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:20,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:20,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:20,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:20,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:20,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:20,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:20,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:20,876 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:21,095 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:57:21,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:21,095 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:21,096 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:57:21,096 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:57:21,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:21,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:57:21,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 23:57:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:21,181 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 23:57:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:21,181 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:21,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:21,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:21,182 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:57:21,182 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:21,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:21,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-09-30 23:57:21,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:21,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:21,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:21,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:21,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:21,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:21,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:21,279 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:21,284 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:21,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:21,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:21,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:21,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:21,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:21,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:21,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:21,310 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 23:57:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:21,509 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:57:21,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:21,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:21,510 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:57:21,510 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:57:21,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:21,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:57:21,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 23:57:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:21,604 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:21,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:21,604 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:21,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:21,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:21,604 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:21,604 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:21,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:21,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-09-30 23:57:21,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:21,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:21,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:21,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:21,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:21,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:21,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:21,713 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:21,720 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:57:21,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:21,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:21,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:21,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:21,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:21,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:21,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:21,746 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:21,960 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:57:21,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:21,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:21,961 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:57:21,961 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:57:21,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:21,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:57:22,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 23:57:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:22,054 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:22,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:22,054 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:22,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:22,054 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:22,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:22,054 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:22,054 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:22,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:22,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-09-30 23:57:22,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:22,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:22,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:22,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:22,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:22,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:22,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:22,219 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:22,228 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:57:22,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:22,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:22,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:22,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:22,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:22,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:22,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:22,252 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:22,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:22,442 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:22,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:22,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:22,443 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:22,443 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:22,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 23:57:22,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:22,552 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:22,552 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:22,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:22,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:22,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:22,552 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:22,553 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:22,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:22,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-09-30 23:57:22,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:22,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:22,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:22,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:22,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:22,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:22,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:22,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:22,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:22,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:22,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:22,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:22,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:22,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:22,839 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:23,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:23,007 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:23,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:23,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:23,008 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:23,008 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:23,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-30 23:57:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:57:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:57:23,084 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 23:57:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:23,085 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:57:23,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:57:23,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:23,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:23,085 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:57:23,086 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:23,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:23,086 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-09-30 23:57:23,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:23,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:23,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:23,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:23,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:23,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:23,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:23,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:23,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:23,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:23,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:23,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:23,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:23,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:23,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:23,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:23,211 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 23:57:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:23,439 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:57:23,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:23,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:23,440 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:57:23,440 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:57:23,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:57:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 23:57:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:23,540 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:23,540 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:23,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:23,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:23,540 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:23,540 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:23,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:23,541 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-09-30 23:57:23,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:23,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:23,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:23,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:23,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:23,602 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:23,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:23,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:23,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:23,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:23,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:23,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:23,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:23,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:23,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:23,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:23,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:23,642 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:23,853 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:57:23,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:23,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:23,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:23,854 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:57:23,854 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:57:23,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:57:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 23:57:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:23,951 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:23,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:23,951 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:23,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:23,951 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:23,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:23,951 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:23,951 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:23,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:23,952 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-09-30 23:57:23,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:23,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:23,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:23,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:23,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:24,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:24,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:24,029 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:24,034 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:24,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:24,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:24,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:24,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:24,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:24,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:24,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:24,058 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:24,264 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:57:24,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:24,264 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:24,264 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:57:24,264 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:57:24,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:57:24,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 23:57:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:24,361 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:24,361 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:24,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:24,361 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:24,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:24,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:24,361 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:24,362 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:24,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:24,362 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-09-30 23:57:24,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:24,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:24,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:24,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:24,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:24,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:24,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:24,477 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:24,486 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:57:24,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:24,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:24,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:24,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:24,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:24,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:24,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:24,512 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:24,708 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:57:24,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:24,708 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:24,709 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:57:24,709 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:57:24,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:57:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 23:57:24,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:24,797 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 23:57:24,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:24,797 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:24,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:24,798 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:24,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:24,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:24,798 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:24,798 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:24,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:24,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-09-30 23:57:24,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:24,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:24,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:24,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:24,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:24,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:24,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:24,872 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:24,887 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:57:24,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:24,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:24,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:24,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:24,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:24,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:24,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:24,916 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 23:57:25,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:25,129 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:57:25,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:25,129 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:25,130 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:57:25,130 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:57:25,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:25,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:57:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 23:57:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:25,223 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:25,223 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:25,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:25,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:25,224 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:25,224 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:25,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:25,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-09-30 23:57:25,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:25,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:25,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:25,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:25,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:25,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:25,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:25,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:25,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:25,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:25,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:25,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:25,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:25,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:25,486 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:25,687 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:57:25,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:25,687 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:25,687 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:57:25,687 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:57:25,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:57:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 23:57:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:25,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:25,783 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:25,784 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:25,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:25,784 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:25,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:25,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:25,784 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:25,784 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:25,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:25,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-09-30 23:57:25,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:25,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:25,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:25,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:25,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:25,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:25,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:25,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:25,995 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:25,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:25,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:26,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:26,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:26,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:26,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:26,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:26,020 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:26,227 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:26,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:26,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:26,228 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:26,228 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:26,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:26,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:26,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 23:57:26,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:26,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:26,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:26,335 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:26,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:26,335 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:26,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:26,335 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:26,335 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:26,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:26,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-09-30 23:57:26,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:26,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:26,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:26,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:26,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:26,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:26,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:26,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:26,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:26,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:26,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:26,418 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:26,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:26,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:26,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:26,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:26,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:26,437 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:26,632 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:26,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:26,632 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:26,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:26,633 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:26,633 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:26,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-30 23:57:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:57:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:57:26,710 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-30 23:57:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:26,710 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:57:26,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:57:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:26,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:26,711 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:57:26,711 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:26,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:26,711 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-09-30 23:57:26,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:26,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:26,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:26,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:26,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:26,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:26,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:26,780 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:26,786 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:26,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:26,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:26,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:26,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:26,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:26,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:26,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:26,816 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-30 23:57:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:27,039 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:27,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:27,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:27,040 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:27,040 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:27,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 23:57:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:27,167 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:27,168 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:27,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:27,168 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:27,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:27,168 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:27,168 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:27,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:27,168 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-09-30 23:57:27,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:27,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:27,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:27,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:27,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:27,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:27,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:27,244 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:27,252 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:57:27,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:27,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:27,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:27,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:27,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:27,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:27,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:27,277 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:27,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:27,485 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:27,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:27,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:27,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:27,486 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:27,486 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:27,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:27,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 23:57:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:27,589 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:27,589 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:27,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:27,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:27,590 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:27,590 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:27,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:27,590 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-09-30 23:57:27,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:27,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:27,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:27,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:27,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:27,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:27,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:27,660 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:27,669 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:57:27,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:27,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:27,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:27,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:27,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:27,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:27,693 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:27,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:27,889 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:27,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:27,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:27,890 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:27,890 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:27,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 23:57:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:28,015 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:28,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:28,015 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:28,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:28,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:28,015 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:28,016 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:28,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-09-30 23:57:28,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:28,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:28,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:28,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:28,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:28,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:28,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:28,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:28,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:28,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:28,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:28,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:28,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:28,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:28,116 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:28,307 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:28,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:28,307 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:28,308 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:28,308 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:28,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:28,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 23:57:28,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:28,405 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 23:57:28,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:28,405 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:28,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:28,405 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:28,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:28,406 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:28,406 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:28,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:28,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-09-30 23:57:28,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:28,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:28,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:28,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:28,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:28,473 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:28,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:28,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:28,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:28,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:28,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:28,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:28,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:28,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:28,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:28,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:28,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:28,512 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 23:57:28,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:28,716 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:28,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:28,716 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:28,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:28,717 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:28,717 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:28,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 23:57:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:28,825 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:28,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:28,825 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:28,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:28,825 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:28,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:28,825 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:28,825 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:28,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:28,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-09-30 23:57:28,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:28,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:28,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:28,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:28,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:28,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:28,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:28,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:28,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:28,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:28,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:28,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:28,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:28,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:28,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:28,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:28,929 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:29,140 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:29,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:29,140 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:29,141 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:29,141 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:29,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 23:57:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:29,247 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:29,247 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:29,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:29,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:29,248 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:29,248 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:29,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:29,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-09-30 23:57:29,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:29,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:29,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:29,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:29,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:29,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:29,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:29,388 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:29,395 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:29,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:29,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:29,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:29,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:29,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:29,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:29,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:29,422 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:29,614 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:29,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:29,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:29,614 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:29,615 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:29,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 23:57:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:29,722 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:29,722 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:29,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:29,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:29,723 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:29,723 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:29,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:29,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-09-30 23:57:29,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:29,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:29,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:29,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:29,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:29,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:29,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:29,818 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:29,827 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:57:29,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:29,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:29,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:29,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:29,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:29,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:29,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:29,852 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:30,052 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:30,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:30,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:30,053 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:30,053 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:30,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:30,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 23:57:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:57:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:57:30,131 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 23:57:30,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:30,131 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:57:30,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:57:30,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:30,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:30,131 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:30,131 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:30,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:30,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-09-30 23:57:30,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:30,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:30,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:30,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:30,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:30,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:30,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:30,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:30,227 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:57:30,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:30,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:30,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:30,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:30,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:30,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:30,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:30,252 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 23:57:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:30,441 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:30,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:30,441 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:30,442 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:30,442 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:30,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 23:57:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:30,552 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:30,552 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:30,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:30,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:30,552 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:30,553 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:30,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-09-30 23:57:30,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:30,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:30,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:30,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:30,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:30,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:30,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:30,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:30,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:30,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:30,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:30,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:30,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:30,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:30,667 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:30,862 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:57:30,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:30,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:30,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:30,863 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:57:30,863 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:57:30,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:57:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 23:57:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:30,985 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:30,985 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:30,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:30,986 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:30,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:30,986 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:30,986 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:30,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:30,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-09-30 23:57:30,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:30,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:30,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:30,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:30,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:31,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:31,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:31,058 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:31,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:31,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:31,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:31,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:31,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:31,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:31,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:31,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:31,102 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:31,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:31,300 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:31,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:31,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:31,301 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:31,301 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:31,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 23:57:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:31,419 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:31,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:31,419 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:31,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:31,419 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:31,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:31,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:31,419 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:31,419 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:31,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-09-30 23:57:31,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:31,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:31,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:31,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:31,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:31,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:31,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:31,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:31,499 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:31,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:31,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:31,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:31,523 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:31,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:31,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:31,523 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:31,726 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:57:31,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:31,726 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:31,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:31,726 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:57:31,727 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:57:31,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:57:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 23:57:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:31,832 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 23:57:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:31,832 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:31,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:31,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:31,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:31,833 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:31,833 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:31,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:31,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-09-30 23:57:31,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:31,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:31,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:31,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:31,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:31,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:31,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:31,902 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:31,908 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:31,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:31,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:31,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:31,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:31,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:31,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:31,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:31,932 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 23:57:32,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:32,119 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:57:32,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:32,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:32,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:32,119 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:57:32,120 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:57:32,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:32,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:57:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-30 23:57:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:32,237 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:32,237 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:32,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:32,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:32,238 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:32,238 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:32,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:32,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-09-30 23:57:32,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:32,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:32,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:32,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:32,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:32,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:32,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:32,352 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:32,361 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:57:32,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:32,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:32,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:32,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:32,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:32,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:32,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:32,398 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:32,587 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:57:32,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:32,588 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:32,588 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:57:32,588 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:57:32,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:57:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-30 23:57:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:32,696 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:32,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:32,696 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:32,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:32,696 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:32,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:32,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:32,697 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:32,697 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:32,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:32,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-09-30 23:57:32,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:32,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:32,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:32,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:32,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:32,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:32,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:32,765 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:32,774 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:57:32,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:32,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:32,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:32,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:32,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:32,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:32,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:32,799 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:32,985 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 23:57:32,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:32,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:32,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:32,986 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:57:32,986 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:57:32,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:32,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:57:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-30 23:57:33,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:33,087 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:33,087 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:33,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:33,087 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:33,087 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:33,087 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:33,088 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:33,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:33,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-09-30 23:57:33,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:33,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:33,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:33,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:33,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:33,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:33,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:33,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:33,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:33,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:33,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:33,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:33,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:33,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:33,185 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:33,342 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-30 23:57:33,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:33,342 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:33,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:33,343 INFO L225 Difference]: With dead ends: 34 [2018-09-30 23:57:33,343 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:57:33,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:57:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-30 23:57:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:57:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:57:33,409 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-30 23:57:33,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:33,409 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:57:33,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:57:33,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:33,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:33,410 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:57:33,410 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:33,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:33,410 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-09-30 23:57:33,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:33,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:33,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:33,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:33,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:33,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:33,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:33,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:33,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:33,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:33,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:33,497 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:33,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:33,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:33,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:33,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:33,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:33,528 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-30 23:57:33,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:33,811 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:57:33,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:33,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:33,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:33,812 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:57:33,812 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:57:33,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:33,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:57:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 23:57:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:33,940 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:33,941 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:33,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:33,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:33,941 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:33,941 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:33,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:33,941 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-09-30 23:57:33,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:33,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:33,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:33,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:33,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:34,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:34,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:34,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:34,022 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:34,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:34,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:34,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:34,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:34,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:34,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:34,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:34,048 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:34,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:34,324 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:57:34,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:34,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:34,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:34,325 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:57:34,325 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:57:34,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:57:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 23:57:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:34,462 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:34,462 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:34,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:34,462 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:34,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:34,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:34,463 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:34,463 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:34,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:34,463 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-09-30 23:57:34,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:34,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:34,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:34,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:34,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:34,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:34,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:34,524 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:34,531 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:34,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:34,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:34,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:34,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:34,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:34,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:34,557 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:34,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:34,836 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:57:34,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:34,836 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:34,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:34,837 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:57:34,837 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:57:34,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:57:34,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 23:57:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:34,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:34,963 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:34,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:34,964 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:34,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:34,964 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:34,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:34,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:34,964 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:34,964 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:34,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:34,964 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-09-30 23:57:34,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:34,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:34,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:34,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:34,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:35,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:35,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:35,164 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:35,173 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:57:35,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:35,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:35,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:35,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:35,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:35,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:35,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:35,198 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:35,452 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:57:35,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:35,452 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:35,453 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:57:35,453 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:57:35,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:35,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:57:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 23:57:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:35,568 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 23:57:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:35,568 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:35,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:35,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:35,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:35,569 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:35,569 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:35,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:35,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-09-30 23:57:35,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:35,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:35,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:35,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:35,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:35,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:35,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:35,640 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:35,649 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:57:35,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:35,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:35,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:35,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:35,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:35,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:35,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:35,678 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 23:57:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:35,943 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:57:35,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:35,943 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:35,944 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:57:35,944 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:57:35,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:35,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:57:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 23:57:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:36,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:36,060 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:36,060 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:36,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:36,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:36,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:36,061 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:36,061 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:36,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:36,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-09-30 23:57:36,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:36,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:36,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:36,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:36,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:36,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:36,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:36,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:36,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:36,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:36,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:36,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:36,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:36,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:36,162 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:36,424 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:57:36,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:36,424 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:36,425 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:57:36,425 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:57:36,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:36,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:57:36,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 23:57:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:36,552 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:36,552 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:36,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:36,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:36,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:36,553 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:36,553 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:36,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:36,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-09-30 23:57:36,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:36,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:36,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:36,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:36,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:36,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:36,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:36,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:36,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:36,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:36,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:36,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:36,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:36,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:36,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:36,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:36,726 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:36,952 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:36,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:36,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:36,953 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:36,953 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:36,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 23:57:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:37,073 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:37,073 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:37,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:37,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:37,073 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:37,073 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:37,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:37,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-09-30 23:57:37,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:37,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:37,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:37,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:37,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:37,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:37,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:37,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:37,153 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:37,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:37,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:37,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:37,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:37,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:37,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:37,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:37,177 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:37,421 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:37,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:37,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:37,421 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:37,421 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:37,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:37,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-30 23:57:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:57:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:57:37,519 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 23:57:37,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:37,519 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:57:37,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:37,519 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:57:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:37,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:37,519 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:37,520 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:37,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:37,520 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-09-30 23:57:37,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:37,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:37,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:37,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:37,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:37,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:37,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:37,587 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:37,610 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:37,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:37,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:37,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:37,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:37,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:37,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:37,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:37,634 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 23:57:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:37,923 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:57:37,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:37,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:37,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:37,923 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:57:37,923 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:57:37,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:37,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:57:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 23:57:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:38,046 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:38,046 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:38,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:38,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:38,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:38,047 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:38,047 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:38,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:38,047 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-09-30 23:57:38,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:38,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:38,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:38,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:38,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:38,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:38,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:38,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:38,126 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:57:38,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:38,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:38,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:38,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:38,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:38,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:38,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:38,151 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:38,441 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:57:38,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:38,441 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:38,442 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:57:38,442 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:57:38,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:57:38,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-30 23:57:38,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:38,568 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:38,568 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:38,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:38,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:38,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:38,569 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:38,569 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:38,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-09-30 23:57:38,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:38,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:38,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:38,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:38,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:38,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:38,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:38,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:38,666 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:57:38,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:38,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:38,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:38,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:38,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:38,691 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:38,974 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:57:38,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:38,974 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:38,975 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:57:38,975 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:57:38,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:38,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:57:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 23:57:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:39,108 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:39,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:39,108 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:39,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:39,108 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:39,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:39,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:39,108 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:39,109 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:39,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:39,109 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-09-30 23:57:39,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:39,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:39,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:39,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:39,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:39,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:39,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:39,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:39,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:39,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:39,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:39,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:39,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:39,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:39,213 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:39,485 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:57:39,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:39,485 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:39,485 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:57:39,485 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:57:39,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:39,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:57:39,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 23:57:39,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:39,603 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 23:57:39,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:39,603 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:39,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:39,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:39,603 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:39,603 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:39,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:39,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-09-30 23:57:39,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:39,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:39,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:39,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:39,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:39,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:39,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:39,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:39,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:39,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:39,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:39,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:39,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:39,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:39,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:39,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:39,779 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 23:57:40,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:40,032 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:57:40,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:40,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:40,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:40,033 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:57:40,033 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:57:40,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:57:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 23:57:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:40,155 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:40,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:40,155 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:40,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:40,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:40,156 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:40,156 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:40,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:40,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-09-30 23:57:40,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:40,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:40,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:40,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:40,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:40,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:40,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:40,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:40,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:40,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:40,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:40,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:40,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:40,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:40,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:40,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:40,261 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:40,518 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:57:40,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:40,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:40,519 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:57:40,519 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:57:40,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:57:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 23:57:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:40,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:40,638 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:40,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:40,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:40,639 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:40,639 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:40,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-09-30 23:57:40,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:40,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:40,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:40,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:40,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:40,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:40,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:40,709 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:40,715 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:40,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:40,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:40,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:40,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:40,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:40,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:40,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:40,741 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:40,981 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:40,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:40,981 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:40,982 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:40,982 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:40,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:40,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 23:57:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:41,116 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:41,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:41,116 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:41,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:41,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:41,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:41,117 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:41,117 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:41,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:41,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-09-30 23:57:41,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:41,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:41,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:41,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:41,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:41,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:41,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:41,212 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:41,236 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:57:41,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:41,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:41,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:41,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:41,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:41,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:41,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:41,261 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:41,693 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:41,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:41,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:41,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:41,693 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:41,694 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:41,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-30 23:57:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:57:41,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:57:41,854 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-30 23:57:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:41,854 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:57:41,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:41,855 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:57:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:41,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:41,855 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:41,855 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:41,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:41,856 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-09-30 23:57:41,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:41,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:41,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:41,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:41,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:42,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:42,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:42,791 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:42,895 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:57:42,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:42,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:42,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:42,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:42,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:42,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:42,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:42,930 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-30 23:57:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:43,241 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:43,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:43,241 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:43,242 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:43,242 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:43,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 23:57:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:43,393 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:43,393 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:43,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:43,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:43,394 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:43,394 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:43,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:43,394 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-09-30 23:57:43,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:43,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:43,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:43,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:43,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:43,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:43,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:43,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:43,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:43,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:43,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:43,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:43,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:43,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:43,493 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:43,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:43,755 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:43,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:43,755 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:43,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:43,756 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:43,756 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:43,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 23:57:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:43,892 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:43,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:43,893 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:43,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:43,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:43,893 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:43,893 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:43,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:43,894 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-09-30 23:57:43,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:43,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:43,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:43,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:43,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:43,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:43,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:43,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:43,969 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:43,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:43,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:43,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:43,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:43,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:43,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:43,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:43,994 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:44,230 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:44,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:44,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:44,231 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:44,231 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:44,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:44,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 23:57:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:44,370 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:44,371 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:44,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:44,371 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:44,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:44,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:44,371 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:44,371 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:44,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:44,371 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-09-30 23:57:44,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:44,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:44,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:44,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:44,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:44,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:44,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:44,440 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:44,448 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:44,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:44,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:44,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:44,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:44,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:44,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:44,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:44,472 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:44,700 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:44,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:44,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:44,700 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:44,700 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:44,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:44,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-30 23:57:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:44,821 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 23:57:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:44,821 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:44,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:44,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:44,821 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:44,821 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:44,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:44,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-09-30 23:57:44,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:44,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:44,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:44,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:44,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:44,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:44,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:44,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:44,922 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:44,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:44,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:44,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:44,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:44,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:44,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:44,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:44,945 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 23:57:45,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:45,207 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:45,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:45,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:45,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:45,208 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:45,208 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:45,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:45,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 23:57:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:45,342 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:45,342 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:45,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:45,342 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:45,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:45,342 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:45,343 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:45,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:45,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-09-30 23:57:45,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:45,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:45,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:45,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:45,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:45,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:45,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:45,430 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:45,438 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:57:45,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:45,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:45,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:45,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:45,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:45,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:45,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:45,462 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:45,717 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:57:45,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:45,717 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:45,718 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:57:45,718 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:57:45,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:57:45,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 23:57:45,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:45,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:45,842 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:45,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:45,843 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:45,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:45,843 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:45,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:45,843 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:45,843 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:45,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:45,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-09-30 23:57:45,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:45,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:45,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:45,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:45,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:45,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:45,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:45,913 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:45,921 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:57:45,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:45,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:45,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:45,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:45,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:45,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:45,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:45,945 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:46,188 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:57:46,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:46,188 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:46,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:46,189 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:57:46,189 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:57:46,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:57:46,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 23:57:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:46,332 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:46,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:46,332 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:46,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:46,332 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:46,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:46,332 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:46,333 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:46,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:46,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-09-30 23:57:46,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:46,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:46,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:46,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:46,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:46,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:46,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:46,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:46,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:46,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:46,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:46,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:46,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:46,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:46,432 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:46,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:46,666 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:46,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:46,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:46,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:46,667 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:46,667 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:46,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:46,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-30 23:57:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:57:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:57:46,772 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 23:57:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:46,772 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:57:46,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:57:46,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:46,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:46,773 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:46,773 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:46,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:46,773 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-09-30 23:57:46,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:46,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:46,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:46,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:46,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:46,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:46,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:46,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:46,941 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:46,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:46,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:46,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:46,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:46,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:46,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:46,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:46,967 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 23:57:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:47,195 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:47,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:47,195 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:47,196 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:47,196 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:47,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 23:57:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:47,363 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:47,363 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:47,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:47,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:47,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:47,363 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:47,363 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:47,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:47,364 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-09-30 23:57:47,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:47,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:47,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:47,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:47,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:47,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:47,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:47,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:47,448 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:47,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:47,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:47,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:47,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:47,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:47,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:47,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:47,471 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:47,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:47,701 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:57:47,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:47,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:47,702 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:57:47,702 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:57:47,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:57:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-30 23:57:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:47,829 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:47,829 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:47,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:47,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:47,830 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:47,830 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:47,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:47,830 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-09-30 23:57:47,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:47,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:47,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:47,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:47,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:47,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:47,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:47,926 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:47,931 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:47,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:47,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:47,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:47,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:47,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:47,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:47,954 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:48,183 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:57:48,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:48,183 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:48,184 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:57:48,184 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:57:48,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:57:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 23:57:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:48,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:48,319 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:48,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:48,319 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:48,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:48,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:48,319 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:48,319 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:48,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:48,319 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-09-30 23:57:48,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:48,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:48,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:48,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:48,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:48,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:48,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:48,390 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:48,398 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:57:48,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:48,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:48,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:48,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:48,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:48,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:48,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:48,423 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:48,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:48,645 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:57:48,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:48,645 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:48,646 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:57:48,646 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:57:48,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:57:48,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-30 23:57:48,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:48,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:48,771 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 23:57:48,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:48,772 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:48,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:48,772 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:48,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:48,772 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:48,772 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:48,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:48,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-09-30 23:57:48,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:48,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:48,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:48,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:48,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:48,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:48,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:48,846 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:48,874 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:57:48,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:48,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:48,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:48,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:48,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:48,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:48,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:48,903 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 23:57:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:49,138 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:57:49,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:49,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:49,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:49,139 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:57:49,139 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:57:49,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:49,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:57:49,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-30 23:57:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:49,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:49,285 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:49,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:49,285 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:49,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:49,285 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:49,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:49,285 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:49,286 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:49,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:49,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-09-30 23:57:49,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:49,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:49,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:49,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:49,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:49,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:49,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:49,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:49,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:49,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:49,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:49,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:49,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:49,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:49,389 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:49,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:49,618 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:57:49,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:49,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:49,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:49,619 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:57:49,619 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:57:49,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:57:49,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-30 23:57:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:49,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:49,759 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:49,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:49,759 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:49,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:49,759 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:49,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:49,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:49,759 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:49,759 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:49,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:49,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-09-30 23:57:49,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:49,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:49,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:49,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:49,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:49,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:49,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:49,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:49,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:49,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:49,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:49,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:49,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:49,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:49,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:49,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:49,908 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:50,095 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-30 23:57:50,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:50,096 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:50,096 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:57:50,096 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:57:50,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:57:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-30 23:57:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:50,239 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:50,239 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:50,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:50,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:50,239 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:57:50,239 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:50,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:50,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-09-30 23:57:50,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:50,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:50,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:50,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:50,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:50,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:50,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:50,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:50,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:50,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:50,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:50,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:50,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:50,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:50,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:50,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:50,355 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:50,536 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-30 23:57:50,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:50,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:50,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:50,537 INFO L225 Difference]: With dead ends: 34 [2018-09-30 23:57:50,537 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:57:50,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:57:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-30 23:57:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:57:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:57:50,625 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-30 23:57:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:50,625 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:57:50,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:57:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:50,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:50,626 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:57:50,626 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:50,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:50,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-09-30 23:57:50,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:50,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:50,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:50,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:50,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:50,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:50,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:50,939 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:50,945 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:50,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:50,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:50,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:50,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:50,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:50,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:50,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:50,970 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-30 23:57:51,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:51,369 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:57:51,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:51,369 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:51,370 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:57:51,370 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:57:51,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:57:51,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 23:57:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:57:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:57:51,525 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:57:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:51,525 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:57:51,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:51,526 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:57:51,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:51,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:51,526 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:51,526 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:51,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:51,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-09-30 23:57:51,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:51,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:51,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:51,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:51,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:51,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:51,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:51,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:51,605 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:51,613 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:57:51,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:51,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:51,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:51,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:51,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:51,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:51,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:51,638 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:57:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:52,039 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:57:52,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:52,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:52,040 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:57:52,040 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:57:52,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:57:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 23:57:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:52,210 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:52,210 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:52,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:52,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:52,210 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:52,211 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:52,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:52,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-09-30 23:57:52,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:52,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:52,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:52,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:52,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:52,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:52,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:52,280 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:52,287 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:57:52,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:52,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:52,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:52,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:52,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:52,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:52,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:52,320 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:52,703 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:57:52,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:52,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:52,703 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:57:52,703 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:57:52,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:57:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 23:57:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:57:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:57:52,898 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:57:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:52,898 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:57:52,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:57:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:52,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:52,899 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:52,899 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:52,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:52,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-09-30 23:57:52,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:52,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:52,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:52,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:52,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:52,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:52,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:52,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:52,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:52,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:52,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:52,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:52,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:52,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:52,999 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:57:53,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:53,359 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:57:53,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:53,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:53,365 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:57:53,365 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:57:53,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:53,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:57:53,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-30 23:57:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:57:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:57:53,519 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:57:53,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:53,519 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:57:53,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:57:53,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:53,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:53,519 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:53,520 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:53,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-09-30 23:57:53,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:53,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:53,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:53,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:53,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:53,584 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:53,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:53,593 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:53,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:53,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:53,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:53,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:53,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:53,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:53,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:53,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:53,622 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:57:54,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:54,006 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:57:54,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:54,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:54,006 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:57:54,006 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:57:54,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:54,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:57:54,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 23:57:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:57:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:57:54,169 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:57:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:54,169 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:57:54,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:54,169 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:57:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:54,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:54,170 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:54,170 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:54,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:54,170 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-09-30 23:57:54,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:54,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:54,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:54,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:54,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:54,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:54,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:54,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:54,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:54,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:54,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:54,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:54,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:54,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:54,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:54,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:54,270 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:57:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:54,671 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:57:54,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:54,671 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:54,672 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:57:54,672 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:57:54,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:54,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:57:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 23:57:54,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:54,844 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:54,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:54,844 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:54,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:54,844 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:54,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:54,845 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:54,845 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:54,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:54,845 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-09-30 23:57:54,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:54,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:54,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:54,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:54,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:54,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:54,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:54,945 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:57:54,951 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:57:54,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:54,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:54,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:54,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:54,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:54,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:54,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:54,976 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:55,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:55,348 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:57:55,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:55,348 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:55,349 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:57:55,349 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:57:55,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:57:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 23:57:55,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:57:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:57:55,520 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:57:55,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:55,520 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:57:55,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:55,520 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:57:55,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:55,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:55,520 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:55,520 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:55,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:55,521 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-09-30 23:57:55,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:55,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:55,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:55,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:55,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:55,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:55,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:55,613 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:57:55,622 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:57:55,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:55,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:55,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:55,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:55,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:55,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:55,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:55,646 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:57:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:56,001 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:57:56,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:56,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:56,002 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:57:56,002 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:57:56,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:56,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:57:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-30 23:57:56,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:57:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:57:56,146 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 23:57:56,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:56,146 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:57:56,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:57:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:56,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:56,146 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:57:56,147 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:56,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:56,147 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-09-30 23:57:56,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:56,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:56,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:56,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:56,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:57,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:57,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:57,157 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:57:57,256 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:57:57,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:57,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:57,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:57,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:57,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:57,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:57,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:57,299 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 23:57:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:57,936 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:57:57,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:57,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:57,937 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:57:57,937 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:57:57,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:57,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:57:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 23:57:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:57:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:57:58,117 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:57:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:58,117 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:57:58,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:57:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:58,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:58,117 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:58,117 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:58,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:58,118 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-09-30 23:57:58,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:58,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:58,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:58,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:58,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:58,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:58,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:58,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:58,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:58,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:58,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:58,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:58,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:58,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:58,226 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:57:58,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:58,656 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:57:58,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:58,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:58,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:58,657 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:57:58,657 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:57:58,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:58,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:57:58,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 23:57:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:57:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:57:58,818 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:57:58,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:58,818 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:57:58,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:58,818 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:57:58,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:58,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:58,819 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:58,819 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:58,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:58,819 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-09-30 23:57:58,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:58,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:58,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:58,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:57:58,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:58,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:58,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:58,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:57:58,902 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:57:58,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:58,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:58,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:58,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:58,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:58,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:58,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:58,925 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:57:59,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:57:59,478 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:57:59,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:57:59,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:57:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:57:59,478 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:57:59,478 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:57:59,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:59,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:57:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 23:57:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:57:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:57:59,656 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:57:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:57:59,656 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:57:59,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:57:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:57:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:57:59,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:57:59,657 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:57:59,657 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:57:59,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:57:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-09-30 23:57:59,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:57:59,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:57:59,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:59,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:57:59,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:57:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:57:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:59,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:57:59,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:57:59,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:57:59,798 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:57:59,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:57:59,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:57:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:57:59,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:57:59,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:57:59,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:57:59,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:57:59,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:57:59,833 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:00,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:00,300 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:58:00,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:00,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:00,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:00,300 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:58:00,301 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:58:00,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:58:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-30 23:58:00,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:58:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:58:00,460 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:58:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:00,460 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:58:00,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:58:00,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:00,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:00,461 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:00,461 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:00,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:00,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-09-30 23:58:00,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:00,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:00,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:00,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:00,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:00,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:00,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:00,537 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:00,543 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:00,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:00,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:00,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:00,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:00,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:00,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:00,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:00,575 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:58:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:00,910 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:58:00,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:00,910 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:00,911 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:58:00,911 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:58:00,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:00,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:58:01,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 23:58:01,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:01,090 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:01,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:01,090 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:01,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:01,090 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:01,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:01,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:01,091 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:01,091 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:01,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:01,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-09-30 23:58:01,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:01,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:01,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:01,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:01,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:01,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:01,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:01,159 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:01,166 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:58:01,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:01,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:01,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:01,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:01,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:01,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:01,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:01,190 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:01,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:01,552 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:58:01,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:01,552 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:01,553 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:58:01,553 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:58:01,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:58:01,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 23:58:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:01,730 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:01,730 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:01,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:01,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:01,731 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:01,731 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:01,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:01,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-09-30 23:58:01,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:01,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:01,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:01,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:01,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:01,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:01,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:01,799 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:01,807 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:58:01,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:01,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:01,831 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:01,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:01,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:01,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:01,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:01,832 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:02,175 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:58:02,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:02,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:02,176 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:58:02,176 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:58:02,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:58:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 23:58:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:02,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:02,358 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:02,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:02,359 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:02,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:02,359 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:02,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:02,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:02,359 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:02,359 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:02,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:02,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-09-30 23:58:02,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:02,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:02,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:02,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:02,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:02,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:02,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:02,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:02,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:02,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:02,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:02,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:02,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:02,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:02,471 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:02,792 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:58:02,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:02,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:02,793 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:58:02,793 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:58:02,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:58:02,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-30 23:58:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:58:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:58:02,925 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 23:58:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:02,925 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:58:02,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:02,925 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:58:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:02,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:02,926 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:02,926 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:02,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:02,926 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-09-30 23:58:02,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:02,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:02,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:02,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:02,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:02,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:02,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:02,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:03,002 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:03,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:03,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:03,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:03,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:03,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:03,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:03,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:03,026 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 23:58:03,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:03,447 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:58:03,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:03,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:03,448 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:58:03,448 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:58:03,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:58:03,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 23:58:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:03,623 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:03,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:03,623 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:03,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:03,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:03,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:03,623 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:03,623 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:03,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:03,624 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-09-30 23:58:03,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:03,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:03,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:03,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:03,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:03,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:03,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:03,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:03,705 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:58:03,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:03,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:03,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:03,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:03,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:03,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:03,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:03,728 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:04,152 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:58:04,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:04,152 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:04,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:04,153 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:58:04,153 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:58:04,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:58:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 23:58:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:04,345 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:04,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:04,345 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:04,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:04,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:04,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:04,345 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:04,346 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:04,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:04,346 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-09-30 23:58:04,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:04,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:04,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:04,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:04,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:04,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:04,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:04,414 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:04,419 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:04,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:04,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:04,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:04,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:04,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:04,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:04,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:04,443 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:04,861 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:58:04,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:04,861 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:04,862 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:58:04,862 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:58:04,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:58:05,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 23:58:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:05,055 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:05,055 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:05,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:05,055 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:05,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:05,055 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:05,055 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:05,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:05,056 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-09-30 23:58:05,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:05,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:05,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:05,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:05,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:05,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:05,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:05,161 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:05,171 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:58:05,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:05,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:05,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:05,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:05,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:05,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:05,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:05,196 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:05,569 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:58:05,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:05,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:05,570 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:58:05,570 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:58:05,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:05,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:58:05,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-30 23:58:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:58:05,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:58:05,744 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:58:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:05,744 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:58:05,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:58:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:05,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:05,744 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:05,744 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:05,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:05,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-09-30 23:58:05,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:05,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:05,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:05,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:05,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:05,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:05,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:05,814 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:05,821 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:58:05,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:05,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:05,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:05,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:05,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:05,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:05,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:05,845 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:58:06,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:06,276 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:58:06,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:06,276 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:06,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:06,277 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:58:06,277 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:58:06,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:58:06,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-30 23:58:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:06,475 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:06,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:06,475 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:06,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:06,475 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:06,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:06,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:06,476 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:06,476 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:06,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:06,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-09-30 23:58:06,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:06,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:06,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:06,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:06,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:06,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:06,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:06,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:06,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:06,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:06,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:06,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:06,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:06,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:06,573 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:07,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:07,005 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:58:07,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:07,005 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:07,006 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:58:07,006 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:58:07,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:58:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-30 23:58:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:07,186 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:07,186 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:07,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:07,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:07,187 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:07,187 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:07,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:07,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-09-30 23:58:07,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:07,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:07,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:07,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:07,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:07,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:07,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:07,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:07,280 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:07,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:07,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:07,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:07,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:07,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:07,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:07,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:07,304 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:07,714 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:58:07,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:07,714 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:07,715 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:58:07,715 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:58:07,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:07,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:58:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-30 23:58:07,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:07,911 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:07,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:07,911 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:07,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:07,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:07,912 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:07,912 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:07,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:07,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-09-30 23:58:07,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:07,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:07,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:07,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:07,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:07,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:07,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:07,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:07,992 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:58:07,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:07,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:08,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:08,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:08,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:08,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:08,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:08,015 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:08,412 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:58:08,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:08,412 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:08,413 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:58:08,413 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:58:08,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:58:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-30 23:58:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:58:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:58:08,566 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 23:58:08,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:08,566 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:58:08,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:08,566 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:58:08,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:08,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:08,566 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:08,567 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:08,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-09-30 23:58:08,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:08,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:08,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:08,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:08,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:08,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:08,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:08,640 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:08,646 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:08,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:08,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:08,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:08,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:08,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:08,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:08,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:08,670 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 23:58:09,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:09,073 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:58:09,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:09,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:09,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:09,074 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:58:09,074 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:58:09,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:09,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:58:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 23:58:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:09,275 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:09,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:09,275 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:09,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:09,275 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:09,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:09,276 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:09,276 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:09,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:09,276 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-09-30 23:58:09,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:09,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:09,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:09,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:09,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:09,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:09,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:09,345 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:09,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:58:09,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:09,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:09,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:09,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:09,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:09,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:09,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:09,380 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:09,778 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:58:09,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:09,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:09,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:09,778 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:58:09,778 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:58:09,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:58:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 23:58:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:09,965 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:09,965 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:09,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:09,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:09,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:09,965 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:09,965 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:09,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:09,966 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-09-30 23:58:09,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:09,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:09,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:09,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:09,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:10,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:10,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:10,166 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:10,175 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:58:10,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:10,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:10,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:10,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:10,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:10,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:10,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:10,200 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:10,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:10,598 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:58:10,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:10,598 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:10,599 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:58:10,599 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:58:10,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:58:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 23:58:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:10,794 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:10,795 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:10,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:10,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:10,795 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:10,795 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:10,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:10,796 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-09-30 23:58:10,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:10,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:10,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:10,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:10,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:10,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:10,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:10,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:10,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:10,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:10,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:10,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:10,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:10,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:10,898 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:11,284 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:58:11,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:11,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:11,285 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:58:11,285 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:58:11,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:58:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-30 23:58:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:58:11,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:58:11,470 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:58:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:11,470 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:58:11,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:11,470 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:58:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:11,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:11,470 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:11,471 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:11,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:11,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-09-30 23:58:11,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:11,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:11,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:11,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:11,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:11,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:11,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:11,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:11,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:11,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:11,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:11,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:11,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:11,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:11,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:11,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:11,583 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:58:11,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:11,945 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:58:11,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:11,945 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:11,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:11,945 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:58:11,945 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:58:11,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:58:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 23:58:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:12,144 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:12,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:12,144 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:12,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:12,144 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:12,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:12,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:12,145 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:12,145 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:12,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:12,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-09-30 23:58:12,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:12,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:12,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:12,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:12,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:12,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:12,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:12,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:12,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:58:12,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:12,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:12,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:12,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:12,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:12,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:12,268 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:12,637 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:58:12,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:12,637 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:12,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:12,638 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:58:12,638 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:58:12,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:12,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:58:12,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 23:58:12,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:12,830 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:12,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:12,830 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:12,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:12,830 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:12,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:12,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:12,831 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:12,831 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:12,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:12,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-09-30 23:58:12,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:12,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:12,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:12,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:12,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:12,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:12,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:12,918 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:12,923 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:12,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:12,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:12,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:12,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:12,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:12,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:12,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:12,947 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:13,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:13,308 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:58:13,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:13,308 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:13,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:13,309 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:58:13,309 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:58:13,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:58:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 23:58:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:13,494 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:13,494 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:13,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:13,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:13,494 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:58:13,495 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:13,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:13,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-09-30 23:58:13,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:13,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:13,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:13,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:13,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:13,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:13,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:13,586 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:13,595 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:58:13,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:13,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:13,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:13,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:13,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:13,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:13,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:13,620 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:13,969 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:58:13,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:13,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:13,970 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:58:13,970 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:58:13,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:13,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:58:14,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-09-30 23:58:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:58:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:58:14,100 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-30 23:58:14,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:14,100 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:58:14,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:58:14,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:14,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:14,101 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:14,101 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:14,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-09-30 23:58:14,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:14,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:14,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:14,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:14,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:14,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:14,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:14,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:14,173 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:14,182 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:58:14,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:14,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:14,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:14,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:14,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:14,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:14,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:14,207 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-30 23:58:14,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:14,613 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:58:14,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:14,613 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:14,614 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:58:14,614 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:58:14,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:58:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 23:58:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:14,831 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:14,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:14,831 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:14,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:14,831 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:14,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:14,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:14,832 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:14,832 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:14,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:14,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-09-30 23:58:14,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:14,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:14,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:14,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:14,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:14,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:14,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:14,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:14,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:14,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:14,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:14,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:14,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:14,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:14,940 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:15,352 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:58:15,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:15,352 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:15,352 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:58:15,352 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:58:15,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:15,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:58:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 23:58:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:15,563 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:15,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:15,563 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:15,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:15,564 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:15,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:15,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:15,564 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:15,564 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:15,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:15,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-09-30 23:58:15,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:15,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:15,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:15,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:15,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:15,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:15,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:15,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:15,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:15,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:15,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:15,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:15,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:15,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:15,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:15,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:15,657 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:16,083 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:58:16,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:16,083 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:16,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:16,083 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:58:16,083 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:58:16,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:58:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 23:58:16,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:16,299 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:16,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:16,299 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:16,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:16,299 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:16,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:16,299 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:16,300 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:16,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:16,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-09-30 23:58:16,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:16,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:16,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:16,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:16,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:16,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:16,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:16,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:16,432 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:58:16,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:16,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:16,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:16,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:16,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:16,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:16,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:16,467 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:16,858 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:58:16,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:16,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:16,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:16,859 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:58:16,859 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:58:16,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:16,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:58:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-30 23:58:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:58:17,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:58:17,038 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:58:17,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:17,038 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:58:17,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:17,038 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:58:17,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:17,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:17,039 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:17,039 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:17,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:17,039 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-09-30 23:58:17,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:17,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:17,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:17,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:17,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:17,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:17,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:17,108 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:17,114 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:17,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:17,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:17,118 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:17,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:17,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:17,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:17,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:17,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:17,148 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:58:17,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:17,569 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:58:17,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:17,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:17,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:17,570 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:58:17,570 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:58:17,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:17,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:58:17,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 23:58:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:17,791 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:17,791 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:17,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:17,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:17,791 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:17,792 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:17,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:17,792 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-09-30 23:58:17,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:17,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:17,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:17,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:17,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:17,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:17,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:17,863 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:17,872 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:58:17,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:17,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:17,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:17,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:17,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:17,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:17,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:17,897 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:18,288 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:58:18,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:18,288 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:18,288 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:58:18,288 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:58:18,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:58:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-30 23:58:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:18,501 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:18,502 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:18,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:18,502 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:18,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:18,502 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:18,502 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:18,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:18,502 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-09-30 23:58:18,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:18,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:18,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:18,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:18,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:18,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:18,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:18,580 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:18,589 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:58:18,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:18,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:18,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:18,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:18,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:18,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:18,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:18,613 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:18,984 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:58:18,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:18,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:18,984 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:58:18,984 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:58:18,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:18,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:58:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 23:58:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:19,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:19,197 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:19,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:19,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:19,197 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:19,197 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:19,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:19,197 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-09-30 23:58:19,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:19,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:19,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:19,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:19,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:19,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:19,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:19,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:19,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:19,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:19,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:19,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:19,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:19,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:19,302 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:19,643 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:58:19,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:19,643 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:19,644 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:58:19,644 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:58:19,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:58:19,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-30 23:58:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:58:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:58:19,821 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 23:58:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:19,821 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:58:19,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:58:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:19,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:19,822 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:19,822 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:19,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:19,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-09-30 23:58:19,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:19,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:19,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:19,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:19,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:19,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:19,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:19,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:19,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:19,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:19,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:19,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:19,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:19,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:19,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:19,925 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 23:58:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:20,409 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:58:20,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:20,409 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:20,409 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:58:20,409 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:58:20,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:58:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 23:58:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:20,650 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:20,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:20,650 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:20,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:20,650 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:20,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:20,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:20,650 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:20,650 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:20,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:20,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-09-30 23:58:20,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:20,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:20,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:20,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:20,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:20,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:20,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:20,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:20,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:58:20,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:20,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:20,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:20,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:20,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:20,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:20,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:20,859 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:21,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:21,367 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:58:21,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:21,367 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:21,368 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:58:21,368 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:58:21,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:21,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:58:21,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-30 23:58:21,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:21,579 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:21,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:21,579 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:21,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:21,579 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:21,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:21,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:21,580 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:21,580 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:21,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:21,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-09-30 23:58:21,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:21,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:21,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:21,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:21,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:21,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:21,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:21,781 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:21,786 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:21,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:21,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:21,809 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:21,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:21,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:21,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:21,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:21,810 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:22,240 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:58:22,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:22,240 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:22,241 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:58:22,241 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:58:22,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:58:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 23:58:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:22,460 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:22,460 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:22,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:22,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:22,460 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:22,460 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:22,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:22,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-09-30 23:58:22,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:22,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:22,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:22,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:22,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:22,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:22,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:22,528 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:22,536 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:58:22,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:22,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:22,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:22,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:22,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:22,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:22,560 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:22,967 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:58:22,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:22,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:22,967 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:58:22,967 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:58:22,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:22,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:58:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-30 23:58:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:58:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:58:23,169 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:58:23,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:23,169 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:58:23,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:58:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:23,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:23,170 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:23,170 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:23,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:23,170 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-09-30 23:58:23,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:23,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:23,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:23,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:23,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:23,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:23,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:23,243 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:23,252 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:58:23,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:23,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:23,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:23,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:23,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:23,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:23,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:23,276 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:58:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:23,654 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:58:23,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:23,654 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:23,655 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:58:23,655 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:58:23,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:23,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:58:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 23:58:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:23,880 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:23,880 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:23,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:23,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:23,881 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:23,881 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:23,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:23,881 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-09-30 23:58:23,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:23,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:23,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:23,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:23,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:24,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:24,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:24,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:24,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:24,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:24,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:24,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:24,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:24,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:24,929 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:25,574 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:58:25,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:25,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:25,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:25,574 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:58:25,575 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:58:25,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:25,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:58:25,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-30 23:58:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:25,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:25,793 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:25,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:25,793 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:25,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:25,794 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:25,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:25,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:25,794 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:25,794 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:25,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:25,794 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-09-30 23:58:25,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:25,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:25,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:25,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:25,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:25,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:25,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:25,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:25,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:25,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:25,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:25,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:25,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:25,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:25,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:25,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:25,940 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:26,320 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:58:26,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:26,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:26,321 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:58:26,321 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:58:26,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:58:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 23:58:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:26,529 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:26,529 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:26,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:26,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:26,529 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:58:26,529 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:26,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:26,530 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-09-30 23:58:26,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:26,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:26,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:26,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:26,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:26,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:26,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:26,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:26,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:58:26,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:26,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:26,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:26,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:26,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:26,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:26,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:26,699 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:27,063 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:58:27,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:27,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:27,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:27,064 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:58:27,064 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:58:27,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:27,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:58:27,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-09-30 23:58:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:58:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:58:27,225 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-30 23:58:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:27,225 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:58:27,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:27,226 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:58:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:27,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:27,226 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:27,226 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:27,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:27,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-09-30 23:58:27,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:27,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:27,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:27,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:27,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:27,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:27,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:27,298 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:27,306 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:27,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:27,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:27,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:27,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:27,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:27,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:27,331 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-30 23:58:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:27,701 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:58:27,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:27,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:27,702 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:58:27,702 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:58:27,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:27,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:58:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 23:58:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:27,932 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:27,932 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:27,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:27,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:27,933 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:27,933 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:27,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:27,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-09-30 23:58:27,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:27,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:27,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:27,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:27,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:27,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:27,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:28,003 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:28,012 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:58:28,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:28,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:28,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:28,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:28,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:28,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:28,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:28,046 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:28,444 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:58:28,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:28,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:28,445 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:58:28,445 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:58:28,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:28,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:58:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 23:58:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:28,669 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:28,669 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:28,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:28,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:28,670 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:28,670 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:28,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:28,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-09-30 23:58:28,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:28,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:28,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:28,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:28,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:28,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:28,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:28,736 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:28,744 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:58:28,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:28,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:28,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:28,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:28,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:28,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:28,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:28,770 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:29,130 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:58:29,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:29,130 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:29,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:29,131 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:58:29,131 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:58:29,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:29,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:58:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-30 23:58:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:29,362 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:29,363 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:29,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:29,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:29,363 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:29,363 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:29,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:29,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-09-30 23:58:29,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:29,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:29,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:29,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:29,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:29,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:29,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:29,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:29,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:29,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:29,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:29,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:29,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:29,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:29,462 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:29,844 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:58:29,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:29,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:29,845 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:58:29,845 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:58:29,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:58:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-30 23:58:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:58:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:58:30,059 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:58:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:30,059 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:58:30,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:58:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:30,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:30,059 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:30,060 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:30,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-09-30 23:58:30,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:30,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:30,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:30,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:30,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:30,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:30,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:30,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:30,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:30,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:30,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:30,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:30,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:30,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:30,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:30,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:30,163 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:58:30,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:30,551 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:58:30,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:30,551 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:30,551 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:58:30,551 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:58:30,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:58:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-30 23:58:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:30,787 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:30,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:30,787 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:30,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:30,787 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:30,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:30,788 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:30,788 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:30,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:30,788 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-09-30 23:58:30,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:30,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:30,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:30,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:30,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:30,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:30,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:30,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:30,958 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:58:30,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:30,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:30,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:30,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:30,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:30,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:30,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:30,996 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:31,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:31,747 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:58:31,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:31,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:31,748 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:58:31,748 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:58:31,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:31,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:58:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-30 23:58:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:31,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:31,973 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:31,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:31,973 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:31,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:31,973 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:31,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:31,973 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:31,973 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:31,974 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-09-30 23:58:31,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:31,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:31,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:31,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:31,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:32,036 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:32,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:32,048 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:32,054 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:32,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:32,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:32,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:32,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:32,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:32,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:32,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:32,077 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:32,435 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:58:32,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:32,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:32,436 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:58:32,436 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:58:32,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:32,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:58:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-30 23:58:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:32,664 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:32,664 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:32,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:32,664 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:32,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:32,665 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:58:32,665 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:32,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-09-30 23:58:32,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:32,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:32,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:32,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:32,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:32,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:32,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:32,734 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:32,742 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:58:32,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:32,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:32,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:32,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:32,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:32,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:32,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:32,766 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:33,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:33,114 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:58:33,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:33,114 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:33,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:33,115 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:58:33,115 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:58:33,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:58:33,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-30 23:58:33,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:58:33,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:58:33,310 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-30 23:58:33,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:33,310 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:58:33,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:33,310 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:58:33,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:33,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:33,311 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-30 23:58:33,311 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:33,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:33,311 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-09-30 23:58:33,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:33,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:33,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:33,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:33,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:33,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:33,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:33,379 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:33,388 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:58:33,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:33,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:33,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:33,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:33,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:33,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:33,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:33,414 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-30 23:58:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:33,756 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:58:33,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:33,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:33,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:33,757 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:58:33,757 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:58:33,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:58:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 23:58:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:33,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:33,993 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:33,994 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:33,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:33,994 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:33,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:33,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:33,994 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:33,994 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:33,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-09-30 23:58:33,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:33,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:33,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:33,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:33,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:34,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:34,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:34,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:34,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:34,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:34,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:34,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:34,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:34,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:34,100 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:34,426 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:58:34,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:34,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:34,427 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:58:34,427 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:58:34,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:58:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-30 23:58:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:34,648 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:34,648 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:34,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:34,649 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:34,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:34,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:34,649 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:34,649 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:34,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:34,649 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-09-30 23:58:34,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:34,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:34,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:34,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:34,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:34,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:34,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:34,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:34,746 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:34,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:34,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:34,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:34,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:34,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:34,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:34,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:34,774 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:35,119 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:58:35,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:35,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:35,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:35,120 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:58:35,120 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:58:35,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:58:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 23:58:35,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:35,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:35,362 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:35,362 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:35,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:35,362 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:35,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:35,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:35,362 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:58:35,362 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:35,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:35,363 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-09-30 23:58:35,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:35,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:35,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:35,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:35,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:35,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:35,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:35,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:35,461 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-30 23:58:35,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:35,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:35,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:35,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:35,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:35,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:35,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:35,486 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:35,809 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:58:35,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:35,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:35,809 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:58:35,809 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:58:35,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:58:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-30 23:58:36,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:58:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:58:36,029 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-30 23:58:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:36,029 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:58:36,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:36,029 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:58:36,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:36,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:36,030 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-30 23:58:36,030 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:36,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:36,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-09-30 23:58:36,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:36,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:36,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:36,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:36,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:36,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:36,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:36,124 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:36,130 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:36,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:36,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:36,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:36,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:36,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:36,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:36,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:36,153 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-30 23:58:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:36,470 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:58:36,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:36,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:36,471 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:58:36,471 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:58:36,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:58:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-09-30 23:58:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:36,713 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:36,713 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:36,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:36,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:36,713 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:58:36,713 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:36,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:36,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-09-30 23:58:36,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:36,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:36,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:36,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:36,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:36,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:36,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:36,783 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:36,792 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-30 23:58:36,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:36,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:36,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:36,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:36,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:36,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:36,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:36,818 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:37,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:37,125 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:58:37,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:37,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:37,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:37,126 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:58:37,126 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:58:37,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:58:37,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-09-30 23:58:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:37,358 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-30 23:58:37,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:37,358 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:37,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:37,359 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:37,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:37,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:37,359 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-30 23:58:37,359 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:37,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:37,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-09-30 23:58:37,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:37,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:37,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:37,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:37,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:37,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:37,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:37,432 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:37,440 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 23:58:37,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:37,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:37,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:37,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:37,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:37,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:37,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:37,464 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-30 23:58:37,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:37,773 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-30 23:58:37,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:37,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:37,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:37,774 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:58:37,774 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:58:37,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:58:38,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-09-30 23:58:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:38,016 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-30 23:58:38,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:38,016 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:38,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:38,017 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:58:38,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:38,017 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-30 23:58:38,017 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:38,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:38,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-09-30 23:58:38,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:38,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:38,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:38,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:38,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:38,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:38,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:38,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:38,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:38,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:38,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:58:38,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:58:38,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:58:38,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:38,732 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-30 23:58:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:39,003 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-09-30 23:58:39,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:58:39,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-30 23:58:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:39,004 INFO L225 Difference]: With dead ends: 36 [2018-09-30 23:58:39,004 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:58:39,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:58:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:58:39,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-09-30 23:58:39,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:58:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-30 23:58:39,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-30 23:58:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:39,155 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-30 23:58:39,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:58:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-30 23:58:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:39,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:39,155 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-09-30 23:58:39,155 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:39,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:39,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-09-30 23:58:39,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:39,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:39,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:39,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:39,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:39,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:39,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:39,252 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:39,259 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:39,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:39,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:39,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:39,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:39,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:39,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:39,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:39,285 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-09-30 23:58:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:39,884 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 23:58:39,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:39,884 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:39,885 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:58:39,885 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:58:39,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:39,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:58:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 23:58:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:58:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:58:40,173 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:58:40,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:40,173 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:58:40,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:58:40,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:40,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:40,174 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 23:58:40,175 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:40,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:40,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-09-30 23:58:40,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:40,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:40,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:40,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:40,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:40,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:40,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:40,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:40,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:40,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:40,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:40,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:40,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:40,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:40,305 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:58:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:40,896 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 23:58:40,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:40,896 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:40,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:40,896 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:58:40,896 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:58:40,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:58:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 23:58:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:41,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:41,154 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:58:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:41,155 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:41,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:41,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:41,155 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 23:58:41,155 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:41,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:41,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-09-30 23:58:41,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:41,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:41,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:41,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:41,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:41,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:41,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:41,250 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:41,257 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:41,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:41,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:41,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:41,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:41,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:41,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:41,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:41,281 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:58:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:41,870 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:58:41,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:41,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:41,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:41,871 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:58:41,871 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:58:41,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:58:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 23:58:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:58:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:58:42,151 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:58:42,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:42,151 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:58:42,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:42,151 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:58:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:42,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:42,151 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:58:42,151 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:42,152 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:42,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-09-30 23:58:42,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:42,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:42,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:42,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:42,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:42,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:42,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:42,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:42,243 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:58:42,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:42,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:42,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:42,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:42,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:42,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:42,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:42,268 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:58:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:42,829 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:58:42,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:42,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:42,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:42,829 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:58:42,829 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:58:42,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:42,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:58:43,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 23:58:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:43,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:43,073 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 23:58:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:43,074 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:43,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:43,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:43,074 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 23:58:43,074 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:43,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:43,074 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-09-30 23:58:43,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:43,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:43,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:43,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:43,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:43,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:43,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:43,146 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:43,153 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:43,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:43,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:43,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:43,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:43,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:43,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:43,177 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 23:58:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:43,782 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 23:58:43,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:43,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:43,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:43,782 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:58:43,782 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:58:43,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:58:44,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 23:58:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:58:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:58:44,078 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:58:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:44,078 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:58:44,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:44,078 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:58:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:44,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:44,078 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:58:44,078 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:44,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:44,079 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-09-30 23:58:44,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:44,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:44,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:44,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:44,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:44,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:44,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:44,154 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:44,164 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:58:44,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:44,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:44,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:44,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:44,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:44,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:44,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:44,189 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:58:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:44,774 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 23:58:44,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:44,774 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:44,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:44,775 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:58:44,775 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:58:44,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:58:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 23:58:45,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:45,060 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:58:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:45,060 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:45,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:45,060 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:45,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:45,060 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:58:45,060 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:45,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:45,060 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-09-30 23:58:45,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:45,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:45,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:45,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:45,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:45,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:45,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:45,141 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:45,151 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:58:45,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:45,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:45,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:45,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:45,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:45,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:45,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:45,176 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:58:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:45,756 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:58:45,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:45,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:45,757 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:58:45,757 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:58:45,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:45,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:58:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 23:58:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:58:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:58:46,060 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:58:46,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:46,061 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:58:46,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:46,061 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:58:46,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:46,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:46,061 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:58:46,061 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:46,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:46,061 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-09-30 23:58:46,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:46,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:46,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:46,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:46,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:46,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:46,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:46,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:46,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:46,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:46,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:46,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:46,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:46,203 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:58:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:46,750 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:58:46,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:46,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:46,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:46,750 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:58:46,750 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:58:46,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:46,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:58:46,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 23:58:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:58:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:58:46,997 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 23:58:46,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:46,997 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:58:46,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:58:46,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:46,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:46,998 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 23:58:46,998 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:46,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-09-30 23:58:46,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:46,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:46,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:46,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:46,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:47,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:47,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:47,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:47,082 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:47,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:47,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:47,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:47,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:47,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:47,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:47,106 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 23:58:47,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:47,669 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:58:47,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:47,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:47,669 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:58:47,669 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:58:47,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:58:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 23:58:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:58:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:58:47,953 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:58:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:47,953 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:58:47,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:58:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:47,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:47,953 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:58:47,953 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:47,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:47,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-09-30 23:58:47,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:47,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:47,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:47,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:48,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:48,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:48,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:48,041 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:58:48,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:48,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:48,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:48,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:48,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:48,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:48,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:48,075 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:58:48,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:48,642 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:58:48,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:48,642 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:48,643 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:58:48,643 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:58:48,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:58:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 23:58:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:48,935 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:58:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:48,936 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:48,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:48,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:48,936 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:58:48,936 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:48,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:48,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-09-30 23:58:48,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:48,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:48,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:48,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:48,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:49,005 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:49,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:49,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:49,013 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:49,020 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:49,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:49,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:49,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:49,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:49,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:49,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:49,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:49,043 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:58:49,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:49,594 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:58:49,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:49,594 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:49,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:49,595 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:58:49,595 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:58:49,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:58:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 23:58:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:58:49,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:58:49,878 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:58:49,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:49,878 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:58:49,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:58:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:49,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:49,878 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:58:49,879 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:49,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:49,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-09-30 23:58:49,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:49,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:49,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:49,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:49,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:49,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:49,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:49,956 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:49,965 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:58:49,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:49,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:49,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:49,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:49,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:49,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:49,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:49,990 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:58:50,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:50,528 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:58:50,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:50,528 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:50,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:50,528 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:58:50,528 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:58:50,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:50,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:58:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 23:58:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:50,777 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 23:58:50,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:50,777 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:50,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:50,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:50,777 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:58:50,777 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:50,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:50,778 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-09-30 23:58:50,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:50,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:50,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:50,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:50,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:50,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:50,856 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:50,866 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:58:50,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:50,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:50,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:50,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:50,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:50,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:50,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:50,891 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 23:58:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:51,411 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:58:51,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:51,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:51,411 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:58:51,411 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:58:51,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:58:51,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 23:58:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:58:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:58:51,714 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:58:51,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:51,714 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:58:51,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:51,714 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:58:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:51,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:51,715 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:58:51,715 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:51,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:51,715 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-09-30 23:58:51,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:51,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:51,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:51,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:51,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:51,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:51,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:51,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:51,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:51,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:51,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:51,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:51,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:51,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:51,823 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:58:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:52,349 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:58:52,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:52,349 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:52,350 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:58:52,350 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:58:52,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:58:52,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 23:58:52,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:52,641 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:58:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:52,641 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:52,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:52,642 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:52,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:52,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:52,642 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:58:52,642 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:52,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:52,642 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-09-30 23:58:52,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:52,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:52,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:52,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:52,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:52,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:52,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:52,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:52,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:52,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:52,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:52,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:52,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:52,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:52,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:52,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:52,764 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:58:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:53,271 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:58:53,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:53,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:53,272 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:58:53,272 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:58:53,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:58:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 23:58:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:58:53,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:58:53,573 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:58:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:53,573 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:58:53,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:58:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:53,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:53,573 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:58:53,573 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:53,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:53,573 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-09-30 23:58:53,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:53,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:53,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:53,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:53,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:53,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:53,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:53,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:53,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:58:53,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:53,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:53,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:53,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:53,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:53,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:53,683 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:58:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:54,154 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:58:54,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:54,154 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:54,155 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:58:54,155 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:58:54,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:58:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-30 23:58:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:58:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:58:54,431 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 23:58:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:54,431 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:58:54,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:58:54,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:54,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:54,431 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 23:58:54,432 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:54,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:54,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-09-30 23:58:54,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:54,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:54,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:54,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:54,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:54,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:54,508 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:58:54,514 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:58:54,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:54,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:54,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:54,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:54,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:54,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:54,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:54,539 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 23:58:55,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:55,178 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 23:58:55,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:55,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:55,179 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:58:55,179 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:58:55,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:58:55,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 23:58:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:58:55,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:58:55,494 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:58:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:55,494 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:58:55,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:58:55,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:55,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:55,494 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:58:55,494 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:55,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:55,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-09-30 23:58:55,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:55,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:55,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:55,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:55,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:55,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:55,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:55,583 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:58:55,592 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:58:55,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:55,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:55,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:55,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:55,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:55,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:55,617 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:58:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:56,255 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 23:58:56,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:56,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:56,256 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:58:56,256 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:58:56,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:56,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:58:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 23:58:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:58:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:58:56,553 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:58:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:56,553 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:58:56,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:56,553 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:58:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:56,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:56,553 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:58:56,553 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:56,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:56,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-09-30 23:58:56,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:56,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:56,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:56,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:56,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:56,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:56,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:56,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:58:56,690 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:58:56,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:56,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:56,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:56,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:56,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:56,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:56,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:56,715 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:58:57,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:57,323 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:58:57,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:57,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:57,323 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:58:57,323 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:58:57,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:57,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:58:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 23:58:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:58:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:58:57,630 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:58:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:57,630 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:58:57,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:58:57,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:57,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:57,631 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:58:57,631 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:57,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:57,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-09-30 23:58:57,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:57,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:57,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:57,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:57,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:57,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:57,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:57,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:57,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:57,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:57,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:57,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:57,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:57,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:57,738 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:58:58,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:58,325 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:58:58,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:58,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:58,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:58,326 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:58:58,326 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:58:58,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:58:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 23:58:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:58:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:58:58,606 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 23:58:58,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:58,606 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:58:58,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:58,606 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:58:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:58,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:58,606 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:58:58,607 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:58,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:58,607 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-09-30 23:58:58,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:58,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:58,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:58,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:58:58,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:58,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:58,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:58,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:58:58,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:58:58,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:58,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:58,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:58,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:58,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:58,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:58,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:58,719 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 23:58:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:58:59,346 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 23:58:59,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:58:59,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:58:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:58:59,347 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:58:59,347 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:58:59,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:58:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 23:58:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:58:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:58:59,656 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:58:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:58:59,656 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:58:59,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:58:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:58:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:58:59,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:58:59,657 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:58:59,657 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:58:59,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:58:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-09-30 23:58:59,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:58:59,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:58:59,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:59,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:58:59,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:58:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:58:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:59,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:58:59,725 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:58:59,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:58:59,743 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:58:59,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:58:59,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:58:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:58:59,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:58:59,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:58:59,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:58:59,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:58:59,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:58:59,769 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:00,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:00,404 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 23:59:00,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:00,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:00,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:00,405 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:59:00,405 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:59:00,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:59:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 23:59:00,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:00,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:00,680 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:00,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:00,680 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:00,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:00,680 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:00,680 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:00,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:00,681 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-09-30 23:59:00,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:00,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:00,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:00,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:00,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:00,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:00,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:00,757 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:00,765 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:00,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:00,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:00,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:00,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:00,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:00,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:00,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:00,791 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:01,414 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:59:01,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:01,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:01,414 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:59:01,414 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:59:01,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:01,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:59:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 23:59:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:01,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:01,724 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:01,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:01,724 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:01,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:01,725 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:01,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:01,725 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:01,725 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:01,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:01,725 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-09-30 23:59:01,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:01,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:01,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:01,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:01,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:01,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:01,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:01,803 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:01,813 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:59:01,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:01,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:01,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:01,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:01,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:01,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:01,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:01,838 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:02,434 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:59:02,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:02,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:02,435 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:59:02,435 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:59:02,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:02,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:59:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 23:59:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:59:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:59:02,696 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 23:59:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:02,696 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:59:02,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:59:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:02,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:02,697 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:59:02,697 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:02,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:02,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-09-30 23:59:02,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:02,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:02,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:02,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:02,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:02,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:02,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:02,771 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:02,782 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:59:02,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:02,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:02,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:02,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:02,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:02,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:02,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:02,808 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 23:59:03,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:03,394 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:59:03,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:03,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:03,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:03,395 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:59:03,395 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:59:03,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:03,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:59:03,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 23:59:03,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:03,689 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:03,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:03,689 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:03,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:03,689 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:03,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:03,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:03,689 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:03,689 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:03,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:03,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-09-30 23:59:03,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:03,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:03,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:03,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:03,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:04,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:04,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:04,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:04,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:04,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:04,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:04,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:04,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:04,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:04,078 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:04,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:04,634 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:59:04,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:04,634 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:04,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:04,635 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:59:04,635 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:59:04,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:59:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 23:59:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:04,945 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:04,946 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:04,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:04,946 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:04,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:04,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:04,946 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:04,946 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:04,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:04,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-09-30 23:59:04,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:04,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:04,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:04,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:04,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:05,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:05,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:05,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:05,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:05,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:05,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:05,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:05,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:05,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:05,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:05,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:05,051 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:05,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:05,651 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:59:05,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:05,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:05,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:05,651 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:59:05,651 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:59:05,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:59:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 23:59:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:05,939 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:05,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:05,939 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:05,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:05,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:05,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:05,940 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:05,940 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:05,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:05,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-09-30 23:59:05,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:05,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:05,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:05,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:05,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:06,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:06,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:06,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:06,034 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:59:06,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:06,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:06,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:06,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:06,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:06,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:06,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:06,068 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:06,652 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:59:06,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:06,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:06,652 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:59:06,652 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:59:06,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:06,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:59:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 23:59:06,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:59:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:59:06,930 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 23:59:06,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:06,931 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:59:06,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:06,931 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:59:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:06,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:06,931 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:06,931 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:06,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:06,931 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-09-30 23:59:06,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:06,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:06,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:06,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:06,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:07,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:07,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:07,010 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:07,015 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:07,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:07,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:07,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:07,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:07,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:07,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:07,040 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 23:59:07,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:07,577 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:59:07,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:07,577 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:07,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:07,577 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:59:07,577 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:59:07,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:59:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 23:59:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:07,874 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:07,874 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:07,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:07,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:07,874 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:07,874 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:07,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:07,874 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-09-30 23:59:07,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:07,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:07,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:07,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:07,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:07,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:07,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:07,954 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:07,965 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:59:07,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:07,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:07,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:07,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:07,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:07,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:07,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:07,990 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:08,520 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:59:08,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:08,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:08,521 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:59:08,521 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:59:08,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:08,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:59:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 23:59:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:08,825 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:08,826 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:08,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:08,826 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:08,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:08,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:08,826 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:08,826 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:08,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:08,826 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-09-30 23:59:08,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:08,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:08,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:08,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:08,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:08,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:08,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:08,899 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:08,911 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:59:08,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:08,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:08,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:08,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:08,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:08,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:08,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:08,936 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:09,452 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:59:09,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:09,452 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:09,453 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:59:09,453 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:59:09,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:59:09,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 23:59:09,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:09,744 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:09,745 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:09,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:09,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:09,745 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:09,745 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:09,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:09,745 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-09-30 23:59:09,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:09,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:09,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:09,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:09,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:09,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:09,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:09,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:09,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:09,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:09,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:09,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:09,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:09,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:09,850 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:10,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:10,354 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:59:10,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:10,354 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:10,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:10,355 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:59:10,355 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:59:10,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:10,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:59:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-30 23:59:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:59:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-30 23:59:10,565 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-30 23:59:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:10,565 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-30 23:59:10,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-30 23:59:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:10,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:10,566 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 23:59:10,566 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:10,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:10,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-09-30 23:59:10,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:10,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:10,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:10,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:10,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:10,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:10,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:10,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:10,648 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:10,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:10,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:10,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:10,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:10,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:10,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:10,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:10,672 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-30 23:59:11,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:11,262 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:59:11,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:11,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:11,262 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:59:11,262 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:59:11,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:59:11,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 23:59:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:11,575 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:11,575 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:11,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:11,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:11,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:11,575 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:59:11,575 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:11,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:11,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-09-30 23:59:11,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:11,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:11,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:11,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:11,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:11,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:11,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:11,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:11,752 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:59:11,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:11,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:11,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:11,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:11,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:11,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:11,778 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:12,329 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:59:12,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:12,329 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:12,330 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:59:12,330 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:59:12,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:12,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:59:12,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 23:59:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:12,655 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:12,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:12,655 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:12,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:12,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:12,656 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:59:12,656 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:12,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:12,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-09-30 23:59:12,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:12,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:12,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:12,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:12,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:12,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:12,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:12,730 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:12,735 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:12,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:12,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:12,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:12,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:12,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:12,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:12,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:12,770 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:13,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:13,425 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:59:13,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:13,425 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:13,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:13,426 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:59:13,426 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:59:13,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:13,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:59:13,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 23:59:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:13,742 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:13,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:13,742 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:13,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:13,743 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:13,743 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:13,743 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:13,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:13,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-09-30 23:59:13,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:13,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:13,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:13,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:13,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:13,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:13,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:13,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:13,868 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:59:13,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:13,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:13,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:13,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:13,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:13,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:13,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:13,894 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:14,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:14,484 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:59:14,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:14,484 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:14,485 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:59:14,485 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:59:14,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:14,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:59:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 23:59:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:59:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:59:14,784 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 23:59:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:14,784 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:59:14,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:14,784 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:59:14,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:14,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:14,785 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:59:14,785 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:14,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:14,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-09-30 23:59:14,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:14,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:14,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:14,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:14,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:14,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:14,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:14,863 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:14,875 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:59:14,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:14,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:14,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:14,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:14,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:14,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:14,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:14,899 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 23:59:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:15,453 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:59:15,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:15,453 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:15,453 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:59:15,453 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:59:15,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:59:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 23:59:15,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:15,791 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:15,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:15,791 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:15,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:15,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:15,791 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:15,791 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:15,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:15,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-09-30 23:59:15,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:15,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:15,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:15,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:15,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:15,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:15,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:15,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:15,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:15,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:15,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:15,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:15,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:15,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:15,977 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:16,509 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:59:16,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:16,509 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:16,509 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:59:16,509 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:59:16,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:59:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 23:59:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:16,895 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:16,895 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:16,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:16,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:16,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:16,895 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:16,896 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:16,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:16,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-09-30 23:59:16,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:16,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:16,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:16,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:16,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:17,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:17,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:17,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:17,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:17,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:17,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:17,039 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:17,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:17,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:17,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:17,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:17,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:17,059 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:17,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:17,582 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:59:17,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:17,582 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:17,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:17,583 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:59:17,583 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:59:17,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:59:17,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 23:59:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:17,906 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:17,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:17,907 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:17,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:17,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:17,907 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:17,907 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:17,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:17,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-09-30 23:59:17,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:17,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:17,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:17,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:17,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:17,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:17,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:17,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:17,995 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:59:17,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:17,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:18,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:18,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:18,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:18,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:18,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:18,020 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:18,519 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:59:18,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:18,519 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:18,520 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:59:18,520 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:59:18,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:18,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:59:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-30 23:59:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:59:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:59:18,803 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 23:59:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:18,804 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:59:18,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:59:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:18,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:18,804 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:59:18,804 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:18,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:18,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-09-30 23:59:18,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:18,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:18,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:18,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:18,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:18,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:18,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:18,880 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:18,886 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:18,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:18,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:18,920 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:18,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:18,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:18,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:18,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:18,921 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 23:59:19,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:19,540 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:59:19,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:19,540 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:19,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:19,541 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:59:19,541 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:59:19,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:59:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 23:59:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:19,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:19,884 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:19,884 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:19,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:19,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:19,885 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:19,885 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:19,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:19,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-09-30 23:59:19,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:19,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:19,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:19,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:19,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:19,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:19,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:19,960 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:19,972 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:59:19,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:19,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:19,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:19,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:19,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:19,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:19,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:19,998 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:20,576 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:59:20,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:20,576 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:20,577 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:59:20,577 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:59:20,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:20,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:59:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-30 23:59:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:20,887 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:20,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:20,887 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:20,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:20,887 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:20,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:20,888 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:20,888 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:20,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:20,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-09-30 23:59:20,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:20,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:20,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:20,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:20,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:20,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:20,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:20,962 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:20,970 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:59:20,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:20,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:21,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:21,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:21,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:21,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:21,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:21,006 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:22,425 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:59:22,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:22,425 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:22,426 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:59:22,426 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:59:22,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:22,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:59:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-30 23:59:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:22,855 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:22,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:22,855 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:22,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:22,855 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:22,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:22,855 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:22,855 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:22,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:22,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-09-30 23:59:22,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:22,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:22,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:22,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:22,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:22,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:22,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:22,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:22,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:22,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:22,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:22,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:22,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:22,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:22,962 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:23,549 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:59:23,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:23,549 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:23,550 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:59:23,550 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:59:23,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:59:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-30 23:59:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:59:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:59:23,918 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 23:59:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:23,918 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:59:23,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:23,918 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:59:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:23,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:23,919 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:23,919 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:23,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:23,919 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-09-30 23:59:23,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:23,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:23,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:23,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:23,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:23,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:23,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:24,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:24,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:24,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:24,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:24,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:24,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:24,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:24,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:24,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:24,034 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 23:59:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:24,598 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:59:24,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:24,598 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:24,599 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:59:24,599 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:59:24,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:24,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:59:24,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-30 23:59:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:24,950 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:24,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:24,950 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:24,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:24,951 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:24,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:24,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:24,951 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:24,951 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:24,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:24,951 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-09-30 23:59:24,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:24,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:24,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:24,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:24,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:25,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:25,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:25,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:25,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:59:25,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:25,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:25,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:25,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:25,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:25,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:25,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:25,064 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:25,612 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-30 23:59:25,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:25,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:25,613 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:59:25,613 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:59:25,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:25,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:59:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-30 23:59:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:25,933 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:25,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:25,933 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:25,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:25,933 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:25,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:25,934 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:25,934 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:25,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:25,934 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-09-30 23:59:25,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:25,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:25,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:25,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:25,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:26,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:26,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:26,011 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:26,017 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:26,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:26,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:26,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:26,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:26,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:26,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:26,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:26,042 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:26,560 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:59:26,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:26,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:26,561 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:59:26,561 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:59:26,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:59:26,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 23:59:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:26,884 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:26,884 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:26,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:26,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:26,885 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:26,885 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:26,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:26,885 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-09-30 23:59:26,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:26,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:26,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:26,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:26,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:26,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:26,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:26,958 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:26,968 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:59:26,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:26,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:26,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:26,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:26,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:26,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:26,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:26,991 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:27,497 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:59:27,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:27,497 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:27,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:27,498 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:59:27,498 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:59:27,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:59:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-30 23:59:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:59:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-30 23:59:27,760 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-30 23:59:27,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:27,760 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-30 23:59:27,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-30 23:59:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:27,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:27,761 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:59:27,761 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:27,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:27,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-09-30 23:59:27,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:27,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:27,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:27,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:27,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:27,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:27,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:27,872 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:27,881 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:59:27,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:27,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:27,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:27,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:27,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:27,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:27,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:27,905 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-30 23:59:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:28,435 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:59:28,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:28,435 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:28,436 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:59:28,436 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:59:28,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:59:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 23:59:28,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:28,759 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:28,759 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:28,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:28,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:28,760 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:28,760 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:28,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:28,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-09-30 23:59:28,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:28,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:28,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:28,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:28,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:28,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:28,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:28,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:28,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:28,864 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:28,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:28,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:28,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:28,865 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:29,411 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:59:29,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:29,411 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:29,411 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:59:29,411 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:59:29,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:59:29,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 23:59:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:29,748 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:29,748 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:29,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:29,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:29,749 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:29,749 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:29,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-09-30 23:59:29,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:29,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:29,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:29,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:29,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:29,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:29,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:29,859 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:29,865 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:29,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:29,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:29,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:29,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:29,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:29,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:29,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:29,892 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:30,387 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:59:30,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:30,387 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:30,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:30,388 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:59:30,388 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:59:30,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:30,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:59:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-30 23:59:30,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:30,719 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:30,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:30,719 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:30,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:30,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:30,719 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:30,720 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:30,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-09-30 23:59:30,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:30,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:30,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:30,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:30,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:30,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:30,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:30,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:30,914 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:59:30,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:30,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:30,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:30,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:30,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:30,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:30,952 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:31,504 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:59:31,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:31,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:31,504 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:59:31,504 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:59:31,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:59:31,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-30 23:59:31,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:59:31,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:59:31,795 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 23:59:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:31,795 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:59:31,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:59:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:31,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:31,795 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:31,796 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:31,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:31,796 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-09-30 23:59:31,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:31,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:31,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:31,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:31,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:31,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:31,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:31,869 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:31,876 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:31,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:31,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:31,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:31,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:31,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:31,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:31,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:31,900 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 23:59:32,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:32,431 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:59:32,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:32,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:32,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:32,431 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:59:32,431 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:59:32,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:32,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:59:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-30 23:59:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:32,788 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:32,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:32,788 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:32,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:32,789 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:32,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:32,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:32,789 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:32,789 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:32,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:32,789 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-09-30 23:59:32,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:32,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:32,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:32,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:32,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:32,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:32,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:32,897 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:32,907 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:59:32,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:32,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:32,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:32,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:32,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:32,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:32,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:32,931 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:33,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:33,463 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-30 23:59:33,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:33,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:33,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:33,464 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:59:33,464 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:59:33,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:33,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:59:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-30 23:59:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:33,811 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:33,811 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:33,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:33,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:33,812 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:33,812 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:33,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:33,812 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-09-30 23:59:33,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:33,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:33,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:33,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:33,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:33,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:33,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:33,888 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:33,906 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:59:33,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:33,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:33,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:33,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:33,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:33,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:33,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:33,931 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:34,444 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-30 23:59:34,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:34,444 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:34,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:34,444 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:59:34,445 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:59:34,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:59:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-30 23:59:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:34,809 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:34,809 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:34,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:34,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:34,810 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:34,810 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:34,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:34,810 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-09-30 23:59:34,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:34,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:34,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:34,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:34,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:34,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:34,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:34,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:34,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:34,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:34,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:34,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:34,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:34,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:34,917 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:35,409 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:59:35,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:35,409 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:35,410 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:59:35,410 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:59:35,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:35,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:59:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-30 23:59:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:59:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:59:35,710 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 23:59:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:35,710 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:59:35,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:59:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:35,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:35,710 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:35,711 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:35,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:35,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-09-30 23:59:35,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:35,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:35,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:35,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:35,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:35,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:35,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:35,798 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:35,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:35,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:35,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:35,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:35,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:35,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:35,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:35,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:35,828 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 23:59:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:36,303 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:59:36,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:36,303 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:36,304 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:59:36,304 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:59:36,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:36,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:59:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-30 23:59:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:36,665 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:36,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:36,666 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:36,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:36,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:36,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:36,666 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:36,666 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:36,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:36,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-09-30 23:59:36,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:36,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:36,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:36,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:36,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:36,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:36,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:36,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:36,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:59:36,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:36,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:36,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:36,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:36,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:36,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:36,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:36,855 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:37,341 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:59:37,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:37,341 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:37,341 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:59:37,341 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:59:37,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:59:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-30 23:59:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:37,680 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:37,680 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:37,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:37,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:37,680 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:37,680 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:37,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:37,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-09-30 23:59:37,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:37,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:37,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:37,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:37,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:37,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:37,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:37,770 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:37,776 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:37,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:37,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:37,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:37,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:37,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:37,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:37,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:37,800 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:38,284 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-30 23:59:38,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:38,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:38,285 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:59:38,285 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:59:38,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:38,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:59:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-30 23:59:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:38,641 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:38,641 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:38,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:38,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:38,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:38,642 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:38,642 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:38,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:38,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-09-30 23:59:38,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:38,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:38,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:38,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:38,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:38,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:38,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:38,716 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:38,727 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:59:38,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:38,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:38,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:38,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:38,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:38,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:38,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:38,752 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:39,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:39,233 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-30 23:59:39,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:39,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:39,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:39,233 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:59:39,233 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:59:39,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:59:39,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-30 23:59:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:59:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:59:39,557 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 23:59:39,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:39,557 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:59:39,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:59:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:39,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:39,557 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:39,557 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:39,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:39,558 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-09-30 23:59:39,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:39,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:39,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:39,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:39,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:39,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:39,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:39,641 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:39,652 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:59:39,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:39,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:39,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:39,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:39,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:39,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:39,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:39,683 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 23:59:40,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:40,133 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:59:40,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:40,133 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:40,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:40,134 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:59:40,134 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:59:40,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:40,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:59:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-30 23:59:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:40,498 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:40,498 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:40,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:40,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:40,498 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:40,498 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:40,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:40,499 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-09-30 23:59:40,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:40,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:40,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:40,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:40,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:40,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:40,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:40,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:40,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:40,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:40,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:40,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:40,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:40,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:40,607 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:41,055 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-30 23:59:41,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:41,055 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:41,056 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:59:41,056 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:59:41,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:59:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-30 23:59:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:41,378 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:41,378 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:41,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:41,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:41,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:41,379 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:41,379 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:41,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:41,379 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-09-30 23:59:41,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:41,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:41,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:41,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:41,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:41,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:41,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:41,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:41,461 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:41,461 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:41,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:41,484 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:41,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:41,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:41,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:41,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:41,485 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:41,911 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-30 23:59:41,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:41,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:41,912 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:59:41,912 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:59:41,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:59:42,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-09-30 23:59:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:42,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:42,272 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:42,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:42,272 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:42,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:42,272 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:42,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:42,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:42,272 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:59:42,272 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:42,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:42,273 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-09-30 23:59:42,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:42,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:42,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:42,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:42,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:42,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:42,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:42,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:42,396 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:59:42,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:42,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:42,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:42,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:42,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:42,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:42,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:42,428 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:42,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:42,871 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-09-30 23:59:42,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:42,871 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:42,872 INFO L225 Difference]: With dead ends: 38 [2018-09-30 23:59:42,872 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 23:59:42,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:42,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 23:59:43,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-09-30 23:59:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:59:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-30 23:59:43,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-09-30 23:59:43,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:43,090 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-30 23:59:43,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-30 23:59:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:43,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:43,090 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-30 23:59:43,091 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:43,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:43,091 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-09-30 23:59:43,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:43,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:43,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:43,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:43,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:43,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:43,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:43,171 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:43,200 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:43,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:43,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:43,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:43,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:43,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:43,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:43,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:43,235 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-09-30 23:59:44,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:44,079 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 23:59:44,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:44,079 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:44,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:44,080 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:59:44,080 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:59:44,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:59:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 23:59:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:44,455 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:44,455 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:44,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:44,455 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:44,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:44,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:44,456 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:59:44,456 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:44,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:44,456 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-09-30 23:59:44,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:44,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:44,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:44,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:44,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:44,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:44,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:44,540 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:44,550 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:59:44,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:44,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:44,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:44,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:44,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:44,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:44,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:44,575 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:45,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:45,375 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 23:59:45,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:45,375 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:45,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:45,376 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:59:45,376 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:59:45,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:59:45,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 23:59:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:45,732 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:45,732 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:45,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:45,732 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:45,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:45,733 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:59:45,733 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:45,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-09-30 23:59:45,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:45,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:45,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:45,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:45,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:45,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:45,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:45,810 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:45,821 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:59:45,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:45,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:45,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:45,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:45,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:45,845 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:46,613 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:59:46,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:46,613 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:46,613 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:59:46,613 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:59:46,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:59:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 23:59:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:47,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:47,018 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:47,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:47,019 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:47,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:47,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:47,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:47,019 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:47,019 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:47,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:47,019 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-09-30 23:59:47,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:47,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:47,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:47,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:47,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:47,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:47,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:47,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:47,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:47,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:47,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:47,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:47,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:47,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:47,127 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:47,858 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:59:47,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:47,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:47,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:47,858 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:59:47,859 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:59:47,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:59:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-30 23:59:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:59:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:59:48,235 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 23:59:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:48,235 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:59:48,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:59:48,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:48,236 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:48,236 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:59:48,236 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:48,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:48,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-09-30 23:59:48,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:48,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:48,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:48,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:48,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:48,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:48,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:48,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:48,318 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:48,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:48,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:48,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:48,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:48,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:48,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:48,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:48,342 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 23:59:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:49,119 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 23:59:49,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:49,119 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:49,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:49,120 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:59:49,120 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:59:49,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:49,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:59:49,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-30 23:59:49,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:49,585 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:49,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:49,585 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:49,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:49,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:49,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:49,585 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:49,585 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:49,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:49,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-09-30 23:59:49,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:49,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:49,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:49,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:49,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:49,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:49,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:49,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:49,671 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:59:49,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:49,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:49,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:49,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:49,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:49,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:49,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:49,697 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:50,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:50,474 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-30 23:59:50,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:50,474 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:50,475 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:59:50,475 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:59:50,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:59:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-30 23:59:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:50,867 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:50,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:50,867 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:50,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:50,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:50,868 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:50,868 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:50,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-09-30 23:59:50,868 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:50,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:50,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:50,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:50,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:50,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:50,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:50,958 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:50,964 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:50,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:50,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:50,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:50,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:50,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:50,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:50,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:50,987 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:51,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:51,741 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-30 23:59:51,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:51,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:51,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:51,742 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:59:51,742 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:59:51,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:59:52,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-30 23:59:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:52,107 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:52,107 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:52,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:52,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:52,108 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:52,108 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:52,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:52,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-09-30 23:59:52,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:52,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:52,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:52,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:52,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:52,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:52,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:52,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:52,184 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:52,193 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:59:52,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:52,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:52,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:52,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:52,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:52,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:52,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:52,226 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:53,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:53,122 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:59:53,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:53,122 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:53,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:53,123 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:59:53,123 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:59:53,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:59:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-30 23:59:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:59:53,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-30 23:59:53,467 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-30 23:59:53,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:53,467 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-30 23:59:53,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:53,467 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-30 23:59:53,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:53,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:53,467 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-30 23:59:53,468 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:53,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:53,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-09-30 23:59:53,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:53,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:53,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:53,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:53,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:53,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:53,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:53,546 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:59:53,556 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-30 23:59:53,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:53,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:53,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:53,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:53,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:53,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:53,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:53,581 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-30 23:59:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:54,328 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:59:54,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:54,328 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:54,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:54,329 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:59:54,329 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:59:54,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:59:54,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 23:59:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:54,727 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:54,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:54,728 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:54,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:54,728 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:54,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:54,728 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:54,728 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:54,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:54,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-09-30 23:59:54,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:54,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:54,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:54,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:54,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:54,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:54,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:54,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:54,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:54,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:54,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:54,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:54,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:54,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:54,834 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:55,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:55,552 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:59:55,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:55,552 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:55,552 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:59:55,552 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:59:55,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:59:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-30 23:59:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:59:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-30 23:59:55,958 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-30 23:59:55,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:55,958 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-30 23:59:55,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:55,958 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-30 23:59:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:55,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:55,958 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:55,958 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:55,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:55,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-09-30 23:59:55,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:55,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:55,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:55,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:59:55,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:56,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:56,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:56,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:59:56,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:59:56,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:56,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:56,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:56,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:56,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:56,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:56,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:56,067 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-30 23:59:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:56,794 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-30 23:59:56,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:56,794 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:56,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:56,795 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:59:56,795 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:59:56,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:59:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-30 23:59:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:57,200 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:57,200 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:57,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:57,201 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:57,201 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:57,201 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:57,201 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:57,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-09-30 23:59:57,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:57,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:57,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:57,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:57,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:57,269 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:57,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:57,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:59:57,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:59:57,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:57,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:57,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:57,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:57,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:57,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:57,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:57,309 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-30 23:59:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:58,015 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-30 23:59:58,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:58,015 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:58,015 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:59:58,015 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:59:58,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:58,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:59:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-30 23:59:58,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:59:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-30 23:59:58,393 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-30 23:59:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:58,393 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-30 23:59:58,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-30 23:59:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:58,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:58,394 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-30 23:59:58,394 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:58,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:58,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-09-30 23:59:58,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:58,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:58,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:58,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:58,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:58,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:58,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:58,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:59:58,483 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:59:58,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:58,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:58,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:58,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:58,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:58,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:58,506 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-30 23:59:59,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:59:59,185 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-30 23:59:59,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:59:59,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-30 23:59:59,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:59:59,186 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:59:59,186 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:59:59,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:59:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-30 23:59:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:59:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-30 23:59:59,604 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-30 23:59:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:59:59,604 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-30 23:59:59,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:59:59,604 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-30 23:59:59,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:59:59,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:59:59,604 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-30 23:59:59,605 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:59:59,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:59:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-09-30 23:59:59,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:59:59,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:59:59,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:59,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:59:59,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:59:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:59:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:59,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:59:59,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:59:59,680 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:59:59,688 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-30 23:59:59,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:59:59,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:59:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:59:59,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:59:59,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:59:59,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:59:59,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:59:59,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:59:59,712 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:00,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:00,384 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:00:00,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:00,384 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:00,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:00,385 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:00:00,385 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:00:00,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:00:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 00:00:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:00:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:00:00,775 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:00:00,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:00,775 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:00:00,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:00,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:00:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:00,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:00,775 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:00,775 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:00,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:00,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-10-01 00:00:00,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:00,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:00,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:00,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:00,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:00,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:00,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:00,865 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:00,875 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:00:00,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:00,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:00,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:00,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:00,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:00,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:00,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:00,898 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:00:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:01,538 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:00:01,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:01,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:01,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:01,539 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:00:01,539 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:00:01,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:00:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 00:00:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:01,939 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:01,939 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:01,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:01,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:01,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:01,940 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:01,940 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:01,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:01,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-10-01 00:00:01,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:01,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:01,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:01,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:01,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:02,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:02,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:02,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:02,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:02,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:02,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:02,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:02,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:02,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:02,048 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:02,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:02,678 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:00:02,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:02,678 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:02,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:02,679 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:00:02,679 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:00:02,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:00:02,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-01 00:00:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 00:00:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 00:00:02,972 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-01 00:00:02,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:02,972 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 00:00:02,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:02,972 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 00:00:02,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:02,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:02,972 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:00:02,972 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:02,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:02,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-10-01 00:00:02,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:02,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:02,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:02,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:02,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:03,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:03,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:03,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:03,112 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:03,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:03,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:03,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:03,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:03,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:03,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:03,135 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-01 00:00:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:03,983 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:00:03,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:03,983 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:03,983 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:00:03,983 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:00:03,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:00:04,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 00:00:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:04,385 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:04,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:04,386 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:04,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:04,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:04,386 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:04,386 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:04,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:04,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-10-01 00:00:04,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:04,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:04,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:04,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:04,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:04,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:04,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:04,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:04,476 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:00:04,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:04,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:04,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:04,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:04,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:04,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:04,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:04,500 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:05,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:05,316 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:00:05,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:05,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:05,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:05,316 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:00:05,316 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:00:05,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:00:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 00:00:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:00:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:00:05,700 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:00:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:05,700 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:00:05,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:05,700 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:00:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:05,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:05,700 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:05,701 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:05,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-10-01 00:00:05,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:05,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:05,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:05,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:05,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:05,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:05,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:05,778 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:05,785 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:05,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:05,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:05,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:05,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:05,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:05,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:05,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:05,808 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:00:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:06,583 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:00:06,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:06,583 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:06,584 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:00:06,584 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:00:06,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:06,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:00:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 00:00:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:06,966 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:06,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:06,966 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:06,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:06,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:06,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:06,967 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:06,967 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:06,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:06,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-10-01 00:00:06,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:06,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:06,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:06,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:06,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:07,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:07,042 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:07,052 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:00:07,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:07,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:07,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:07,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:07,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:07,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:07,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:07,076 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:07,829 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:00:07,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:07,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:07,830 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:00:07,830 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:00:07,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:00:08,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-01 00:00:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:00:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:00:08,231 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:00:08,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:08,231 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:00:08,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:08,232 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:00:08,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:08,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:08,232 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:08,232 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:08,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:08,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-10-01 00:00:08,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:08,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:08,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:08,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:08,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:08,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:08,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:08,400 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:08,441 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:00:08,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:08,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:08,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:08,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:08,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:08,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:08,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:08,466 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:00:09,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:09,295 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:00:09,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:09,296 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:09,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:09,296 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:00:09,296 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:00:09,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:00:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 00:00:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:09,679 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:09,679 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:09,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:09,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:09,679 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:09,679 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:09,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-10-01 00:00:09,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:09,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:09,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:09,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:09,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:09,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:09,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:09,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:09,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:09,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:09,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:09,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:09,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:09,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:09,784 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:10,625 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:00:10,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:10,625 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:10,626 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:00:10,626 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:00:10,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:10,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:00:11,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 00:00:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:00:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:00:11,035 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:00:11,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:11,035 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:00:11,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:00:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:11,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:11,036 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:11,036 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:11,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:11,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-10-01 00:00:11,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:11,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:11,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:11,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:11,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:11,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:11,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:11,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:11,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:11,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:11,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:11,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:11,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:11,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:11,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:11,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:11,175 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:00:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:11,955 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:00:11,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:11,955 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:11,956 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:00:11,956 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:00:11,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:00:12,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 00:00:12,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:12,375 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:12,375 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:12,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:12,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:12,375 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:12,375 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:12,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:12,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-10-01 00:00:12,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:12,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:12,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:12,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:12,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:12,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:12,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:12,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:12,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:00:12,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:12,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:12,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:12,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:12,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:12,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:12,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:12,504 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:13,234 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:00:13,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:13,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:13,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:13,234 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:00:13,235 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:00:13,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:00:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-01 00:00:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:00:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 00:00:13,558 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 00:00:13,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:13,558 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 00:00:13,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:13,558 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 00:00:13,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:13,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:13,558 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:13,559 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:13,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:13,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-10-01 00:00:13,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:13,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:13,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:13,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:13,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:13,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:13,652 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:13,659 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:13,665 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:13,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:13,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:13,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:13,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:13,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:13,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:13,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:13,689 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 00:00:14,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:14,520 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:00:14,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:14,520 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:14,521 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:00:14,521 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:00:14,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:14,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:00:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 00:00:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:14,942 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:14,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:14,943 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:14,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:14,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:14,943 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:14,943 INFO L423 AbstractCegarLoop]: === Iteration 345 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:14,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:14,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1711263936, now seen corresponding path program 329 times [2018-10-01 00:00:14,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:14,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:14,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:14,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:14,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:15,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:15,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:15,020 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:15,029 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:00:15,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:15,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:15,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:15,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:15,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:15,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:15,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:15,054 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:15,806 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:00:15,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:15,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:15,807 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:00:15,807 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:00:15,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:00:16,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 00:00:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:00:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:00:16,222 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:00:16,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:16,222 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:00:16,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:16,222 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:00:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:16,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:16,222 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:16,223 INFO L423 AbstractCegarLoop]: === Iteration 346 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:16,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:16,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1713109056, now seen corresponding path program 330 times [2018-10-01 00:00:16,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:16,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:16,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:16,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:16,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:16,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:16,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:16,336 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:16,348 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:00:16,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:16,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:16,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:16,373 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:16,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:16,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:16,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:16,374 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:00:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:17,150 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:00:17,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:17,150 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:17,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:17,151 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:00:17,151 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:00:17,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:00:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 00:00:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:17,569 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:17,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:17,569 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:17,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:17,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:17,569 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:17,570 INFO L423 AbstractCegarLoop]: === Iteration 347 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:17,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:17,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1713110978, now seen corresponding path program 331 times [2018-10-01 00:00:17,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:17,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:17,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:17,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:17,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:17,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:17,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:17,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:17,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:17,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:17,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:17,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:17,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:17,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:17,672 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:18,388 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:00:18,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:18,388 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:18,388 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:00:18,388 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:00:18,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:18,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:00:18,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-01 00:00:18,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:00:18,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:00:18,778 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:00:18,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:18,778 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:00:18,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:18,778 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:00:18,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:18,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:18,778 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:18,778 INFO L423 AbstractCegarLoop]: === Iteration 348 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:18,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:18,779 INFO L82 PathProgramCache]: Analyzing trace with hash -808697920, now seen corresponding path program 332 times [2018-10-01 00:00:18,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:18,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:18,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:18,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:18,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:18,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:18,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:18,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:18,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:18,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:18,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:18,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:18,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:18,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:18,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:18,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:18,899 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:00:19,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:19,604 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:00:19,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:19,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:19,605 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:00:19,605 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:00:19,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:00:20,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-01 00:00:20,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:20,036 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:20,036 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:20,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:20,037 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:20,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:20,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:20,037 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:20,037 INFO L423 AbstractCegarLoop]: === Iteration 349 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:20,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:20,037 INFO L82 PathProgramCache]: Analyzing trace with hash -808695998, now seen corresponding path program 333 times [2018-10-01 00:00:20,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:20,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:20,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:20,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:20,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:20,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:20,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:20,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:20,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:00:20,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:20,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:20,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:20,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:20,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:20,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:20,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:20,134 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:20,829 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:00:20,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:20,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:20,830 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:00:20,830 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:00:20,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:20,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:00:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 00:00:21,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:00:21,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:00:21,209 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:00:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:21,210 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:00:21,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:00:21,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:21,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:21,210 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:21,210 INFO L423 AbstractCegarLoop]: === Iteration 350 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:21,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:21,210 INFO L82 PathProgramCache]: Analyzing trace with hash -806850878, now seen corresponding path program 334 times [2018-10-01 00:00:21,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:21,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:21,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:21,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:21,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:21,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:21,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:21,320 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:21,327 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:21,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:21,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:21,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:21,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:21,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:21,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:21,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:21,353 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:00:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:22,042 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:00:22,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:22,042 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:22,042 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:00:22,043 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:00:22,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:22,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:00:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 00:00:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:22,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:22,471 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:22,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:22,471 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:22,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:22,471 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:22,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:22,471 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:00:22,471 INFO L423 AbstractCegarLoop]: === Iteration 351 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:22,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:22,472 INFO L82 PathProgramCache]: Analyzing trace with hash -806848956, now seen corresponding path program 335 times [2018-10-01 00:00:22,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:22,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:22,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:22,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:22,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:22,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:22,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:22,648 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:22,659 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:00:22,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:22,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:22,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:22,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:22,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:22,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:22,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:22,683 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:23,320 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:00:23,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:23,321 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:23,321 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:00:23,321 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:00:23,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:00:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-10-01 00:00:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 00:00:23,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 00:00:23,607 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-10-01 00:00:23,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:23,607 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 00:00:23,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 00:00:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:23,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:23,607 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:00:23,607 INFO L423 AbstractCegarLoop]: === Iteration 352 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:23,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:23,608 INFO L82 PathProgramCache]: Analyzing trace with hash -256666948, now seen corresponding path program 336 times [2018-10-01 00:00:23,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:23,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:23,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:23,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:23,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:23,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:23,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:23,775 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:23,783 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:00:23,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:23,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:23,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:23,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:23,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:23,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:23,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:23,808 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-10-01 00:00:24,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:24,578 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:00:24,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:24,578 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:24,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:24,579 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:00:24,579 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:00:24,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:00:24,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 00:00:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:24,989 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:24,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:24,989 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:24,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:24,989 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:24,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:24,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:24,989 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:24,990 INFO L423 AbstractCegarLoop]: === Iteration 353 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:24,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:24,990 INFO L82 PathProgramCache]: Analyzing trace with hash -256665026, now seen corresponding path program 337 times [2018-10-01 00:00:24,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:24,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:24,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:24,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:24,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:25,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:25,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:25,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:25,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:25,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:25,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:25,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:25,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:25,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:25,094 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:25,807 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:00:25,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:25,807 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:25,807 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:00:25,807 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:00:25,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:25,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:00:26,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 00:00:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:00:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:00:26,233 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:00:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:26,233 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:00:26,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:00:26,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:26,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:26,233 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:26,233 INFO L423 AbstractCegarLoop]: === Iteration 354 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:26,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:26,234 INFO L82 PathProgramCache]: Analyzing trace with hash -254819906, now seen corresponding path program 338 times [2018-10-01 00:00:26,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:26,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:26,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:26,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:26,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:26,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:26,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:26,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:26,350 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:26,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:26,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:26,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:26,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:26,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:26,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:26,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:26,374 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:00:27,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:27,114 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:00:27,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:27,114 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:27,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:27,115 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:00:27,115 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:00:27,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:27,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:00:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 00:00:27,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:27,573 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:27,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:27,573 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:27,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:27,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:27,573 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:27,573 INFO L423 AbstractCegarLoop]: === Iteration 355 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:27,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:27,574 INFO L82 PathProgramCache]: Analyzing trace with hash -254817984, now seen corresponding path program 339 times [2018-10-01 00:00:27,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:27,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:27,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:27,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:27,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:27,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:27,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:27,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:27,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:27,680 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:00:27,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:27,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:27,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:27,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:27,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:27,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:27,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:27,705 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:28,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:28,441 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:00:28,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:28,441 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:28,441 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:00:28,441 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:00:28,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:28,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:00:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-01 00:00:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:00:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:00:28,853 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:00:28,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:28,853 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:00:28,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:00:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:28,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:28,853 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:28,854 INFO L423 AbstractCegarLoop]: === Iteration 356 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:28,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1518340414, now seen corresponding path program 340 times [2018-10-01 00:00:28,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:28,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:28,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:28,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:28,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:28,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:28,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:28,947 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:28,960 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:28,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:28,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:28,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:28,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:28,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:28,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:28,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:28,982 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:00:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:29,692 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:00:29,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:29,692 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:29,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:29,693 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:00:29,693 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:00:29,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:29,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:00:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 00:00:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:30,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:30,138 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:30,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:30,138 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:30,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:30,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:30,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:30,139 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:30,139 INFO L423 AbstractCegarLoop]: === Iteration 357 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:30,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:30,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1518342336, now seen corresponding path program 341 times [2018-10-01 00:00:30,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:30,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:30,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:30,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:30,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:30,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:30,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:30,213 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:30,223 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:00:30,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:30,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:30,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:30,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:30,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:30,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:30,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:30,247 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:30,943 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:00:30,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:30,943 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:30,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:30,943 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:00:30,943 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:00:30,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:00:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-01 00:00:31,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:00:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:00:31,381 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:00:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:31,381 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:00:31,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:00:31,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:31,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:31,381 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:31,381 INFO L423 AbstractCegarLoop]: === Iteration 358 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:31,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:31,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1520187456, now seen corresponding path program 342 times [2018-10-01 00:00:31,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:31,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:31,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:31,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:31,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:31,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:31,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:31,460 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:31,469 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:00:31,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:31,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:31,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:31,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:31,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:31,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:31,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:31,494 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:00:32,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:32,151 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:00:32,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:32,151 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:32,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:32,152 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:00:32,152 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:00:32,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:32,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:00:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 00:00:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:32,569 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:32,569 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:32,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:32,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:32,570 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:32,570 INFO L423 AbstractCegarLoop]: === Iteration 359 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:32,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:32,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1520189378, now seen corresponding path program 343 times [2018-10-01 00:00:32,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:32,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:32,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:32,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:32,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:32,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:32,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:32,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:32,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:32,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:32,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:32,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:32,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:32,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:32,676 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:33,289 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 00:00:33,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:33,289 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:33,289 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:00:33,289 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:00:33,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:00:33,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-01 00:00:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:00:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 00:00:33,677 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 00:00:33,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:33,678 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 00:00:33,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 00:00:33,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:33,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:33,678 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:33,678 INFO L423 AbstractCegarLoop]: === Iteration 360 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:33,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:33,679 INFO L82 PathProgramCache]: Analyzing trace with hash 423391422, now seen corresponding path program 344 times [2018-10-01 00:00:33,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:33,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:33,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:33,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:33,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:33,824 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:33,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:33,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:33,838 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:33,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:33,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:33,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:33,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:33,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:33,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:33,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:33,862 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 00:00:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:34,632 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:00:34,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:34,632 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:34,632 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:00:34,632 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:00:34,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:00:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 00:00:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:35,087 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:35,087 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:35,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:35,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:35,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:35,087 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:35,087 INFO L423 AbstractCegarLoop]: === Iteration 361 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:35,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:35,088 INFO L82 PathProgramCache]: Analyzing trace with hash 423393344, now seen corresponding path program 345 times [2018-10-01 00:00:35,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:35,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:35,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:35,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:35,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:35,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:35,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:35,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:35,250 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:00:35,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:35,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:35,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:35,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:35,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:35,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:35,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:35,283 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:36,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:36,018 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:00:36,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:36,018 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:36,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:36,019 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:00:36,019 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:00:36,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:36,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:00:36,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-01 00:00:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:00:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:00:36,441 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:00:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:36,441 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:00:36,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:00:36,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:36,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:36,442 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:36,442 INFO L423 AbstractCegarLoop]: === Iteration 362 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:36,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:36,442 INFO L82 PathProgramCache]: Analyzing trace with hash 425238464, now seen corresponding path program 346 times [2018-10-01 00:00:36,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:36,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:36,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:36,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:36,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:36,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:36,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:36,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:36,532 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:36,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:36,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:36,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:36,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:36,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:36,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:36,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:36,567 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:00:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:37,469 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:00:37,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:37,469 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:37,470 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:00:37,470 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:00:37,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:37,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:00:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 00:00:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:37,922 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:37,922 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:37,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:37,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:37,922 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:37,922 INFO L423 AbstractCegarLoop]: === Iteration 363 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:37,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash 425240386, now seen corresponding path program 347 times [2018-10-01 00:00:37,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:37,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:37,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:37,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:37,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:37,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:37,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:38,002 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:38,012 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:00:38,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:38,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:38,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:38,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:38,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:38,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:38,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:38,036 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:38,782 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:00:38,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:38,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:38,782 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:00:38,782 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:00:38,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:00:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-01 00:00:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:00:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:00:39,202 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:00:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:39,202 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:00:39,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:39,203 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:00:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:39,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:39,203 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:39,203 INFO L423 AbstractCegarLoop]: === Iteration 364 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:39,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:39,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2096568512, now seen corresponding path program 348 times [2018-10-01 00:00:39,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:39,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:39,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:39,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:39,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:39,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:39,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:39,281 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:39,295 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:00:39,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:39,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:39,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:39,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:39,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:39,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:39,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:39,319 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:00:40,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:40,026 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:00:40,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:40,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:40,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:40,026 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:00:40,026 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:00:40,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:40,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:00:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 00:00:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:40,489 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:40,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:40,489 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:40,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:40,490 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:40,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:40,490 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:40,490 INFO L423 AbstractCegarLoop]: === Iteration 365 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:40,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:40,490 INFO L82 PathProgramCache]: Analyzing trace with hash -2096566590, now seen corresponding path program 349 times [2018-10-01 00:00:40,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:40,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:40,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:40,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:40,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:40,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:40,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:40,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:40,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:40,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:40,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:40,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:40,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:40,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:40,594 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:41,291 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:00:41,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:41,291 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:41,292 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:00:41,292 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:00:41,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:00:41,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-01 00:00:41,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:00:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:00:41,696 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:00:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:41,697 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:00:41,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:00:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:41,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:41,697 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:41,697 INFO L423 AbstractCegarLoop]: === Iteration 366 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:41,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2094721470, now seen corresponding path program 350 times [2018-10-01 00:00:41,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:41,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:41,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:41,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:41,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:41,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:41,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:41,773 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:41,778 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:41,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:41,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:41,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:41,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:41,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:41,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:41,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:41,802 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:00:42,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:42,470 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:00:42,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:42,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:42,471 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:00:42,471 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:00:42,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:42,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:00:42,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 00:00:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:42,889 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:42,889 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:42,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:42,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:42,889 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:00:42,889 INFO L423 AbstractCegarLoop]: === Iteration 367 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:42,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:42,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2094719548, now seen corresponding path program 351 times [2018-10-01 00:00:42,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:42,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:42,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:42,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:42,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:42,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:42,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:42,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:42,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:00:42,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:42,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:42,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:42,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:42,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:42,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:42,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:42,997 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:43,672 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 00:00:43,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:43,672 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:43,673 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:00:43,673 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:00:43,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:00:44,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-01 00:00:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 00:00:44,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 00:00:44,021 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-01 00:00:44,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:44,022 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 00:00:44,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:44,022 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 00:00:44,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:44,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:44,022 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:44,022 INFO L423 AbstractCegarLoop]: === Iteration 368 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:44,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:44,022 INFO L82 PathProgramCache]: Analyzing trace with hash 444397630, now seen corresponding path program 352 times [2018-10-01 00:00:44,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:44,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:44,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:44,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:44,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:44,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:44,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:44,132 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:44,137 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:44,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:44,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:44,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:44,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:44,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:44,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:44,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:44,160 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-01 00:00:44,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:44,833 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:00:44,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:44,833 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:44,833 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:00:44,833 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:00:44,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:44,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:00:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 00:00:45,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:45,297 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:45,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:45,297 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:45,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:45,297 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:45,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:45,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:45,297 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:45,297 INFO L423 AbstractCegarLoop]: === Iteration 369 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:45,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:45,298 INFO L82 PathProgramCache]: Analyzing trace with hash 444399552, now seen corresponding path program 353 times [2018-10-01 00:00:45,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:45,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:45,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:45,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:45,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:45,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:45,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:45,374 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:45,382 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:00:45,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:45,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:45,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:45,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:45,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:45,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:45,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:45,414 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:46,097 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:00:46,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:46,097 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:46,098 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:00:46,098 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:00:46,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:00:46,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-01 00:00:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:00:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:00:46,564 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:00:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:46,565 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:00:46,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:00:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:46,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:46,565 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:46,565 INFO L423 AbstractCegarLoop]: === Iteration 370 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:46,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash 446244672, now seen corresponding path program 354 times [2018-10-01 00:00:46,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:46,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:46,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:46,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:46,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:46,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:46,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:46,642 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:46,651 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:00:46,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:46,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:46,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:46,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:46,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:46,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:46,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:46,676 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:00:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:47,315 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 00:00:47,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:47,315 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:47,316 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:00:47,316 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:00:47,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:00:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-01 00:00:47,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:47,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:47,790 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:47,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:47,790 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:47,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:47,790 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:47,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:47,790 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:47,790 INFO L423 AbstractCegarLoop]: === Iteration 371 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:47,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:47,791 INFO L82 PathProgramCache]: Analyzing trace with hash 446246594, now seen corresponding path program 355 times [2018-10-01 00:00:47,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:47,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:47,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:47,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:47,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:47,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:47,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:47,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:47,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:47,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:47,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:47,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:47,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:47,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:47,895 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:48,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:48,512 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 00:00:48,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:48,512 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:48,513 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:00:48,513 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:00:48,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:00:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-01 00:00:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:00:48,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:00:48,955 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:00:48,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:48,955 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:00:48,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:48,955 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:00:48,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:48,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:48,956 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:48,956 INFO L423 AbstractCegarLoop]: === Iteration 372 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:48,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:48,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2075562304, now seen corresponding path program 356 times [2018-10-01 00:00:48,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:48,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:48,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:48,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:48,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:49,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:49,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:49,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:49,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:49,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:49,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:49,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:49,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:49,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:49,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:49,116 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:00:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:49,789 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:00:49,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:49,789 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:49,790 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:00:49,790 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:00:49,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:00:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 00:00:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:50,260 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:50,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:50,260 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:50,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:50,260 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:50,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:50,260 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:50,260 INFO L423 AbstractCegarLoop]: === Iteration 373 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:50,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:50,260 INFO L82 PathProgramCache]: Analyzing trace with hash -2075560382, now seen corresponding path program 357 times [2018-10-01 00:00:50,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:50,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:50,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:50,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:50,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:50,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:50,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:50,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:50,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:00:50,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:50,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:50,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:50,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:50,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:50,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:50,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:50,379 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:51,073 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:00:51,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:51,073 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:51,074 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:00:51,074 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:00:51,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:51,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:00:51,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-01 00:00:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:00:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:00:51,534 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:00:51,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:51,534 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:00:51,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:51,534 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:00:51,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:51,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:51,534 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:51,535 INFO L423 AbstractCegarLoop]: === Iteration 374 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:51,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:51,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2073715262, now seen corresponding path program 358 times [2018-10-01 00:00:51,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:51,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:51,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:51,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:51,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:51,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:51,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:51,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:51,620 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:51,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:51,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:51,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:51,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:51,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:51,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:51,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:51,644 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:00:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:52,292 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 00:00:52,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:52,292 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:52,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:52,293 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:00:52,293 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:00:52,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:00:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-01 00:00:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:52,763 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:52,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:52,763 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:52,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:52,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:52,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:52,763 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:00:52,763 INFO L423 AbstractCegarLoop]: === Iteration 375 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:52,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:52,764 INFO L82 PathProgramCache]: Analyzing trace with hash -2073713340, now seen corresponding path program 359 times [2018-10-01 00:00:52,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:52,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:52,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:52,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:52,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:52,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:52,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:52,849 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:52,860 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:00:52,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:52,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:52,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:52,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:52,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:52,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:52,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:52,884 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:53,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:53,499 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 00:00:53,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:53,499 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:53,500 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:00:53,500 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:00:53,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:53,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:00:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-01 00:00:53,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:00:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 00:00:53,889 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 00:00:53,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:53,890 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 00:00:53,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 00:00:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:53,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:53,890 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:00:53,890 INFO L423 AbstractCegarLoop]: === Iteration 376 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:53,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:53,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1124456000, now seen corresponding path program 360 times [2018-10-01 00:00:53,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:53,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:53,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:53,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:53,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:53,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:53,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:53,970 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:00:53,979 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:00:53,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:53,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:54,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:54,015 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:54,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:54,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:54,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:54,016 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 00:00:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:54,615 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 00:00:54,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:54,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:54,615 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:00:54,615 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:00:54,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:00:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-01 00:00:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:55,047 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:55,047 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:55,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:55,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:55,047 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:55,047 INFO L423 AbstractCegarLoop]: === Iteration 377 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:55,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:55,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1124457922, now seen corresponding path program 361 times [2018-10-01 00:00:55,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:55,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:55,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:55,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:55,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:55,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:55,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:55,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:55,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:55,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:55,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:55,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:55,155 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:55,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:55,752 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 00:00:55,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:55,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:55,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:55,753 INFO L225 Difference]: With dead ends: 43 [2018-10-01 00:00:55,753 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 00:00:55,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:55,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 00:00:56,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-01 00:00:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:00:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:00:56,212 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:00:56,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:56,212 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:00:56,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:00:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:56,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:56,213 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:56,213 INFO L423 AbstractCegarLoop]: === Iteration 378 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:56,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1126303042, now seen corresponding path program 362 times [2018-10-01 00:00:56,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:56,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:56,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:56,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:00:56,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:56,280 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:56,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:56,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:56,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:00:56,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:00:56,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:56,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:56,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:56,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:56,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:56,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:56,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:56,318 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:00:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:57,021 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 00:00:57,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:57,021 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:57,021 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:00:57,021 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:00:57,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:00:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-01 00:00:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:57,521 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:57,521 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:57,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:57,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:57,521 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:00:57,521 INFO L423 AbstractCegarLoop]: === Iteration 379 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:57,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:57,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1126304964, now seen corresponding path program 363 times [2018-10-01 00:00:57,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:57,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:57,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:57,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:57,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:57,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:57,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:57,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:00:57,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:00:57,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:57,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:57,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:57,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:57,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:57,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:57,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:57,638 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:00:58,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:58,217 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 00:00:58,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:58,217 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:58,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:58,218 INFO L225 Difference]: With dead ends: 43 [2018-10-01 00:00:58,218 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 00:00:58,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:58,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 00:00:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-01 00:00:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:00:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:00:58,648 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:00:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:58,648 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:00:58,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:00:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:58,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:58,649 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:00:58,649 INFO L423 AbstractCegarLoop]: === Iteration 380 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:58,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1395503934, now seen corresponding path program 364 times [2018-10-01 00:00:58,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:58,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:58,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:58,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:58,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:58,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:58,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:58,727 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:00:58,733 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:00:58,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:58,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:58,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:58,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:58,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:58,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:58,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:58,757 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:00:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:00:59,301 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 00:00:59,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:00:59,301 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:00:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:00:59,301 INFO L225 Difference]: With dead ends: 41 [2018-10-01 00:00:59,301 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 00:00:59,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 00:00:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-10-01 00:00:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:00:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:00:59,773 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:00:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:00:59,773 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:00:59,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:00:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:00:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:00:59,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:00:59,773 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:00:59,773 INFO L423 AbstractCegarLoop]: === Iteration 381 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:00:59,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:00:59,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1395502012, now seen corresponding path program 365 times [2018-10-01 00:00:59,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:00:59,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:00:59,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:59,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:00:59,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:00:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:00:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:59,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:00:59,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:00:59,847 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:00:59,856 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:00:59,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:00:59,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:00:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:00:59,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:00:59,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:00:59,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:00:59,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:00:59,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:00:59,880 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:01:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:00,459 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 00:01:00,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:00,459 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:00,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:00,460 INFO L225 Difference]: With dead ends: 41 [2018-10-01 00:01:00,460 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 00:01:00,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:00,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 00:01:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-10-01 00:01:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:01:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:01:00,920 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:01:00,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:00,920 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:01:00,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:00,920 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:01:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:00,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:00,920 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:01:00,921 INFO L423 AbstractCegarLoop]: === Iteration 382 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:00,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1393656892, now seen corresponding path program 366 times [2018-10-01 00:01:00,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:00,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:00,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:00,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:00,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:00,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:00,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:00,995 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:01,005 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:01:01,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:01,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:01,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:01,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:01,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:01,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:01,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:01,030 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:01:01,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:01,548 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-01 00:01:01,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:01,548 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:01,549 INFO L225 Difference]: With dead ends: 39 [2018-10-01 00:01:01,549 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 00:01:01,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:01,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 00:01:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-10-01 00:01:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:01:02,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:01:02,014 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:01:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:02,014 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:01:02,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:01:02,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:02,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:02,014 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 00:01:02,014 INFO L423 AbstractCegarLoop]: === Iteration 383 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:02,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1393654970, now seen corresponding path program 367 times [2018-10-01 00:01:02,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:02,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:02,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:02,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:02,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:02,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:02,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:02,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:02,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:02,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:02,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:02,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:02,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:02,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:02,129 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:01:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:02,623 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-10-01 00:01:02,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:02,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:02,624 INFO L225 Difference]: With dead ends: 38 [2018-10-01 00:01:02,624 INFO L226 Difference]: Without dead ends: 36 [2018-10-01 00:01:02,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-01 00:01:02,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-10-01 00:01:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 00:01:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 00:01:02,904 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-10-01 00:01:02,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:02,904 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 00:01:02,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 00:01:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:02,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:02,905 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 00:01:02,905 INFO L423 AbstractCegarLoop]: === Iteration 384 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:02,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:02,905 INFO L82 PathProgramCache]: Analyzing trace with hash 21654842, now seen corresponding path program 368 times [2018-10-01 00:01:02,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:02,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:02,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:02,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:02,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:02,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:02,976 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:02,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:03,010 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:03,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:03,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:03,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:03,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:03,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:03,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:03,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:03,040 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-10-01 00:01:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:04,211 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:01:04,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:04,214 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:04,214 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:01:04,215 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:01:04,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:01:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 00:01:04,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:04,742 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:04,742 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:04,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:04,743 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:04,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:04,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:04,743 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:01:04,743 INFO L423 AbstractCegarLoop]: === Iteration 385 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:04,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:04,743 INFO L82 PathProgramCache]: Analyzing trace with hash 21656764, now seen corresponding path program 369 times [2018-10-01 00:01:04,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:04,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:04,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:04,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:04,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:04,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:04,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:04,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:04,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:01:04,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:04,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:04,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:04,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:04,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:04,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:04,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:04,859 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:05,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:05,994 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:01:05,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:05,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:05,995 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:01:05,995 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:01:05,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:05,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:01:06,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2018-10-01 00:01:06,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:01:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:01:06,496 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:01:06,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:06,496 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:01:06,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:06,496 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:01:06,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:06,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:06,497 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:01:06,497 INFO L423 AbstractCegarLoop]: === Iteration 386 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:06,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:06,497 INFO L82 PathProgramCache]: Analyzing trace with hash 23501884, now seen corresponding path program 370 times [2018-10-01 00:01:06,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:06,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:06,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:06,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:06,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:06,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:06,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:06,582 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:06,589 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:06,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:06,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:06,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:06,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:06,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:06,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:06,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:06,614 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:01:07,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:07,809 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:01:07,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:07,809 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:07,810 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:01:07,810 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:01:07,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:01:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 00:01:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:08,364 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:08,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:08,364 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:08,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:08,364 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:08,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:08,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:08,365 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:08,365 INFO L423 AbstractCegarLoop]: === Iteration 387 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:08,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:08,365 INFO L82 PathProgramCache]: Analyzing trace with hash 23503806, now seen corresponding path program 371 times [2018-10-01 00:01:08,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:08,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:08,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:08,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:08,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:08,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:08,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:08,476 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:08,486 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:01:08,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:08,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:08,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:08,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:08,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:08,511 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:09,678 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:01:09,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:09,678 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:09,678 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:01:09,679 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:01:09,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:01:10,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 32. [2018-10-01 00:01:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:01:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:01:10,185 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:01:10,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:10,186 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:01:10,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:10,186 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:01:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:10,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:10,186 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:01:10,186 INFO L423 AbstractCegarLoop]: === Iteration 388 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:10,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:10,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1796662204, now seen corresponding path program 372 times [2018-10-01 00:01:10,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:10,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:10,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:10,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:10,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:10,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:10,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:10,259 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:10,269 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:01:10,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:10,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:10,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:10,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:10,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:10,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:10,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:10,295 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:01:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:11,386 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:01:11,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:11,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:11,387 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:01:11,387 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:01:11,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:11,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:01:11,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 00:01:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:11,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:11,914 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:11,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:11,914 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:11,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:11,915 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:11,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:11,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:11,915 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:11,915 INFO L423 AbstractCegarLoop]: === Iteration 389 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:11,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:11,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1796664126, now seen corresponding path program 373 times [2018-10-01 00:01:11,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:11,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:11,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:11,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:11,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:11,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:11,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:11,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:11,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:12,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:12,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:12,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:12,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:12,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:12,021 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:13,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:13,134 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:01:13,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:13,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:13,135 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:01:13,135 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:01:13,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:13,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:01:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2018-10-01 00:01:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:01:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:01:13,658 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:01:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:13,658 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:01:13,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:01:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:13,659 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:13,659 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:13,659 INFO L423 AbstractCegarLoop]: === Iteration 390 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:13,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:13,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1798509246, now seen corresponding path program 374 times [2018-10-01 00:01:13,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:13,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:13,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:13,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:13,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:13,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:13,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:13,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:13,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:13,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:13,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:13,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:13,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:13,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:13,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:13,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:13,764 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:01:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:14,825 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:01:14,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:14,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:14,825 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:01:14,825 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:01:14,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:01:15,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 00:01:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:15,391 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:15,391 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:15,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:15,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:15,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:15,391 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:01:15,391 INFO L423 AbstractCegarLoop]: === Iteration 391 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:15,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:15,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1798511168, now seen corresponding path program 375 times [2018-10-01 00:01:15,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:15,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:15,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:15,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:15,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:15,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:15,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:15,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:15,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:01:15,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:15,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:15,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:15,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:15,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:15,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:15,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:15,509 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:16,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:16,540 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:01:16,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:16,540 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:16,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:16,541 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:01:16,541 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:01:16,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:16,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:01:16,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 30. [2018-10-01 00:01:16,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:01:16,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:01:16,985 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:01:16,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:16,985 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:01:16,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:16,985 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:01:16,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:16,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:16,985 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:01:16,985 INFO L423 AbstractCegarLoop]: === Iteration 392 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:16,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:16,986 INFO L82 PathProgramCache]: Analyzing trace with hash 701713212, now seen corresponding path program 376 times [2018-10-01 00:01:16,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:16,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:16,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:16,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:16,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:17,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:17,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:17,086 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:17,092 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:17,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:17,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:17,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:17,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:17,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:17,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:17,116 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:01:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:18,283 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:01:18,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:18,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:18,283 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:01:18,283 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:01:18,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:18,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:01:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 00:01:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:18,818 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:18,818 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:18,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:18,818 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:18,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:18,818 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:18,818 INFO L423 AbstractCegarLoop]: === Iteration 393 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:18,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:18,818 INFO L82 PathProgramCache]: Analyzing trace with hash 701715134, now seen corresponding path program 377 times [2018-10-01 00:01:18,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:18,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:18,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:18,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:18,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:18,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:18,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:18,895 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:18,905 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:01:18,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:18,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:18,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:18,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:18,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:18,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:18,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:18,929 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:20,067 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:01:20,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:20,067 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:20,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:20,067 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:01:20,067 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:01:20,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:20,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:01:20,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2018-10-01 00:01:20,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:01:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:01:20,605 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:01:20,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:20,605 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:01:20,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:20,605 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:01:20,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:20,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:20,605 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:20,605 INFO L423 AbstractCegarLoop]: === Iteration 394 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:20,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash 703560254, now seen corresponding path program 378 times [2018-10-01 00:01:20,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:20,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:20,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:20,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:20,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:20,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:20,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:20,685 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:20,709 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:01:20,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:20,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:20,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:20,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:20,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:20,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:20,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:20,733 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:01:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:21,962 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:01:21,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:21,962 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:21,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:21,963 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:01:21,963 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:01:21,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:01:22,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 00:01:22,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:22,538 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:22,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:22,538 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:22,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:22,538 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:22,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:22,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:22,538 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:01:22,538 INFO L423 AbstractCegarLoop]: === Iteration 395 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:22,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:22,539 INFO L82 PathProgramCache]: Analyzing trace with hash 703562176, now seen corresponding path program 379 times [2018-10-01 00:01:22,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:22,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:22,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:22,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:22,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:22,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:22,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:22,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:22,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:22,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:22,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:22,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:22,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:22,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:22,643 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:23,825 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:01:23,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:23,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:23,826 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:01:23,826 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:01:23,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:01:24,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 32. [2018-10-01 00:01:24,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:01:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:01:24,356 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:01:24,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:24,356 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:01:24,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:01:24,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:24,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:24,356 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:24,356 INFO L423 AbstractCegarLoop]: === Iteration 396 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:24,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:24,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1818246722, now seen corresponding path program 380 times [2018-10-01 00:01:24,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:24,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:24,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:24,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:24,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:24,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:24,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:24,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:24,436 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:24,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:24,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:24,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:24,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:24,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:24,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:24,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:24,461 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:01:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:25,616 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:01:25,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:25,616 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:25,617 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:01:25,617 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:01:25,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:01:26,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 00:01:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:26,144 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:26,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:26,144 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:26,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:26,144 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:26,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:26,144 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:01:26,144 INFO L423 AbstractCegarLoop]: === Iteration 397 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:26,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:26,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1818244800, now seen corresponding path program 381 times [2018-10-01 00:01:26,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:26,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:26,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:26,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:26,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:26,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:26,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:26,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:26,493 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:01:26,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:26,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:26,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:26,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:26,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:26,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:26,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:26,517 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:27,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:27,617 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:01:27,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:27,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:27,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:27,617 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:01:27,617 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:01:27,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:01:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2018-10-01 00:01:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:01:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:01:28,157 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:01:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:28,157 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:01:28,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:01:28,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:28,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:28,157 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:01:28,157 INFO L423 AbstractCegarLoop]: === Iteration 398 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:28,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:28,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1816399680, now seen corresponding path program 382 times [2018-10-01 00:01:28,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:28,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:28,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:28,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:28,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:28,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:28,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:28,249 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:28,254 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:28,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:28,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:28,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:28,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:28,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:28,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:28,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:28,280 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:01:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:29,367 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:01:29,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:29,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:29,368 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:01:29,368 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:01:29,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:01:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 00:01:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:29,912 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:29,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:29,912 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:29,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:29,912 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:29,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:29,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:29,913 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:29,913 INFO L423 AbstractCegarLoop]: === Iteration 399 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:29,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:29,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1816397758, now seen corresponding path program 383 times [2018-10-01 00:01:29,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:29,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:29,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:29,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:29,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:30,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:30,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:30,049 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:30,078 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:01:30,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:30,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:30,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:30,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:30,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:30,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:30,103 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:31,141 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:01:31,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:31,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:31,142 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:01:31,142 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:01:31,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:31,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:01:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 28. [2018-10-01 00:01:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:01:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 00:01:31,582 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 00:01:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:31,582 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 00:01:31,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 00:01:31,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:31,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:31,582 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:01:31,582 INFO L423 AbstractCegarLoop]: === Iteration 400 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:31,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:31,583 INFO L82 PathProgramCache]: Analyzing trace with hash 722719420, now seen corresponding path program 384 times [2018-10-01 00:01:31,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:31,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:31,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:31,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:31,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:31,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:31,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:31,658 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:31,671 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:01:31,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:31,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:31,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:31,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:31,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:31,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:31,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:31,697 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 00:01:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:32,824 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:01:32,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:32,824 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:32,825 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:01:32,825 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:01:32,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:01:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 00:01:33,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:33,415 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:33,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:33,415 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:33,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:33,415 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:33,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:33,416 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:33,416 INFO L423 AbstractCegarLoop]: === Iteration 401 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:33,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:33,416 INFO L82 PathProgramCache]: Analyzing trace with hash 722721342, now seen corresponding path program 385 times [2018-10-01 00:01:33,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:33,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:33,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:33,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:33,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:33,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:33,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:33,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:33,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:33,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:33,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:33,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:33,526 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:34,666 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:01:34,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:34,666 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:34,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:34,666 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:01:34,666 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:01:34,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:34,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:01:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2018-10-01 00:01:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:01:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:01:35,237 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:01:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:35,237 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:01:35,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:35,237 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:01:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:35,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:35,237 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:35,237 INFO L423 AbstractCegarLoop]: === Iteration 402 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:35,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:35,238 INFO L82 PathProgramCache]: Analyzing trace with hash 724566462, now seen corresponding path program 386 times [2018-10-01 00:01:35,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:35,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:35,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:35,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:35,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:35,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:35,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:35,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:35,398 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:35,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:35,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:35,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:35,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:35,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:35,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:35,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:35,432 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:01:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:36,494 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:01:36,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:36,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:36,494 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:01:36,494 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:01:36,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:01:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 00:01:37,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:37,051 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:37,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:37,051 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:37,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:37,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:37,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:37,051 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:01:37,051 INFO L423 AbstractCegarLoop]: === Iteration 403 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:37,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:37,052 INFO L82 PathProgramCache]: Analyzing trace with hash 724568384, now seen corresponding path program 387 times [2018-10-01 00:01:37,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:37,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:37,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:37,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:37,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:37,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:37,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:37,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:37,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:01:37,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:37,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:37,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:37,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:37,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:37,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:37,161 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:38,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:38,195 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:01:38,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:38,195 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:38,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:38,196 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:01:38,196 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:01:38,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:01:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 00:01:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:01:38,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:01:38,730 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:01:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:38,730 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:01:38,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:01:38,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:38,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:38,730 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:38,730 INFO L423 AbstractCegarLoop]: === Iteration 404 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:38,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:38,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1797240514, now seen corresponding path program 388 times [2018-10-01 00:01:38,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:38,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:38,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:38,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:38,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:38,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:38,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:38,842 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:38,848 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:38,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:38,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:38,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:38,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:38,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:38,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:38,872 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:01:39,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:39,971 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:01:39,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:39,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:39,971 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:01:39,971 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:01:39,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:39,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:01:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 00:01:40,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:40,560 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:40,560 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:40,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:40,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:40,560 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:01:40,560 INFO L423 AbstractCegarLoop]: === Iteration 405 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:40,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:40,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1797238592, now seen corresponding path program 389 times [2018-10-01 00:01:40,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:40,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:40,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:40,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:40,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:40,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:40,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:40,638 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:40,650 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:01:40,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:40,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:40,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:40,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:40,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:40,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:40,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:40,674 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:41,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:41,786 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:01:41,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:41,786 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:41,786 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:01:41,786 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:01:41,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:01:42,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2018-10-01 00:01:42,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:01:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:01:42,345 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:01:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:42,345 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:01:42,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:01:42,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:42,345 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:42,346 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:01:42,346 INFO L423 AbstractCegarLoop]: === Iteration 406 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:42,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:42,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1795393472, now seen corresponding path program 390 times [2018-10-01 00:01:42,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:42,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:42,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:42,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:42,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:42,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:42,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:42,422 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:42,431 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:01:42,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:42,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:42,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:42,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:42,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:42,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:42,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:42,456 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:01:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:43,507 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:01:43,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:43,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:43,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:43,508 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:01:43,508 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:01:43,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:01:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 00:01:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:44,073 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:44,073 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:44,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:44,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:44,073 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:44,073 INFO L423 AbstractCegarLoop]: === Iteration 407 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:44,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:44,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1795391550, now seen corresponding path program 391 times [2018-10-01 00:01:44,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:44,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:44,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:44,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:44,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:44,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:44,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:44,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:44,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:44,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:44,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:44,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:44,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:44,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:44,181 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:45,191 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:01:45,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:45,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:45,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:45,191 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:01:45,191 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:01:45,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:01:45,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2018-10-01 00:01:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:01:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:01:45,692 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:01:45,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:45,692 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:01:45,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:45,693 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:01:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:45,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:45,693 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:45,693 INFO L423 AbstractCegarLoop]: === Iteration 408 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:45,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1402777790, now seen corresponding path program 392 times [2018-10-01 00:01:45,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:45,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:45,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:45,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:45,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:45,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:45,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:45,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:45,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:45,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:45,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:45,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:45,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:45,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:45,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:45,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:45,800 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:01:46,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:46,854 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:01:46,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:46,854 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:46,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:46,854 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:01:46,854 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:01:46,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:01:47,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 00:01:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:47,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:47,401 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:47,401 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:47,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:47,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:47,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:47,401 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:01:47,401 INFO L423 AbstractCegarLoop]: === Iteration 409 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:47,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:47,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1402779712, now seen corresponding path program 393 times [2018-10-01 00:01:47,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:47,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:47,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:47,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:47,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:47,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:47,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:47,478 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:47,487 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:01:47,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:47,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:47,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:47,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:47,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:47,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:47,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:47,511 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:48,515 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:01:48,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:48,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:48,515 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:01:48,515 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:01:48,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:01:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 00:01:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:01:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:01:49,101 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:01:49,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:49,101 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:01:49,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:01:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:49,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:49,101 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:01:49,101 INFO L423 AbstractCegarLoop]: === Iteration 410 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:49,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:49,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1404624832, now seen corresponding path program 394 times [2018-10-01 00:01:49,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:49,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:49,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:49,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:49,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:49,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:49,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:49,186 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:49,193 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:49,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:49,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:49,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:49,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:49,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:49,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:49,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:49,216 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:01:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:50,230 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:01:50,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:50,230 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:50,231 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:01:50,231 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:01:50,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:01:50,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 00:01:50,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:50,823 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:50,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:50,823 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:50,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:50,823 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:50,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:50,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:50,823 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:50,823 INFO L423 AbstractCegarLoop]: === Iteration 411 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:50,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:50,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1404626754, now seen corresponding path program 395 times [2018-10-01 00:01:50,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:50,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:50,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:50,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:50,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:50,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:50,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:50,903 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:01:50,910 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:01:50,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:50,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:50,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:50,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:50,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:50,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:50,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:50,936 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:51,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:51,930 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:01:51,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:51,930 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:51,931 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:01:51,931 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:01:51,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:51,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:01:52,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-01 00:01:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:01:52,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:01:52,470 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:01:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:52,470 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:01:52,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:01:52,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:52,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:52,470 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:01:52,470 INFO L423 AbstractCegarLoop]: === Iteration 412 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:52,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:52,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1117182144, now seen corresponding path program 396 times [2018-10-01 00:01:52,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:52,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:52,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:52,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:52,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:52,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:52,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:52,633 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:01:52,646 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:01:52,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:52,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:52,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:52,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:52,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:52,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:52,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:52,669 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:01:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:53,622 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:01:53,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:53,622 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:53,622 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:01:53,622 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:01:53,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:53,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:01:54,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 00:01:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:54,154 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:54,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:54,154 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:54,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:54,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:54,154 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:54,154 INFO L423 AbstractCegarLoop]: === Iteration 413 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:54,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:54,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1117180222, now seen corresponding path program 397 times [2018-10-01 00:01:54,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:54,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:54,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:54,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:54,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:54,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:54,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:54,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:54,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:54,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:54,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:54,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:54,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:54,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:54,258 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:55,211 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:01:55,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:55,211 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:55,211 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:01:55,211 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:01:55,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:01:55,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 00:01:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:01:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:01:55,776 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:01:55,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:55,776 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:01:55,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:55,776 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:01:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:55,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:55,776 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:01:55,776 INFO L423 AbstractCegarLoop]: === Iteration 414 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:55,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:55,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1115335102, now seen corresponding path program 398 times [2018-10-01 00:01:55,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:55,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:55,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:55,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:01:55,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:55,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:55,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:55,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:01:55,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:01:55,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:55,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:55,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:55,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:55,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:55,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:55,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:55,957 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:01:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:56,848 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:01:56,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:56,848 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:56,848 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:01:56,848 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:01:56,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:56,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:01:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2018-10-01 00:01:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:01:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:01:57,422 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:01:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:57,422 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:01:57,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:01:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:57,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:57,422 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:01:57,422 INFO L423 AbstractCegarLoop]: === Iteration 415 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:57,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:57,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1115333180, now seen corresponding path program 399 times [2018-10-01 00:01:57,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:57,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:57,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:57,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:57,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:57,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:57,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:57,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:01:57,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:01:57,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:57,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:57,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:57,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:57,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:57,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:57,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:57,539 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:01:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:01:58,426 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:01:58,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:01:58,426 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:01:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:01:58,427 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:01:58,427 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:01:58,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:01:58,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2018-10-01 00:01:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 00:01:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 00:01:58,838 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-01 00:01:58,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:01:58,839 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 00:01:58,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:01:58,839 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 00:01:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:01:58,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:01:58,839 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:01:58,839 INFO L423 AbstractCegarLoop]: === Iteration 416 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:01:58,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:01:58,839 INFO L82 PathProgramCache]: Analyzing trace with hash -565151172, now seen corresponding path program 400 times [2018-10-01 00:01:58,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:01:58,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:01:58,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:58,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:01:58,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:01:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:01:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:58,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:01:58,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:01:58,916 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:01:58,922 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:01:58,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:01:58,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:01:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:01:58,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:01:58,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:01:58,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:01:58,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:01:58,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:01:58,946 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-01 00:02:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:00,205 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:02:00,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:00,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:00,205 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:02:00,205 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:02:00,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:02:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 00:02:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:00,812 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:00,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:00,813 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:00,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:00,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:00,813 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:00,813 INFO L423 AbstractCegarLoop]: === Iteration 417 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:00,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:00,813 INFO L82 PathProgramCache]: Analyzing trace with hash -565149250, now seen corresponding path program 401 times [2018-10-01 00:02:00,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:00,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:00,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:00,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:00,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:00,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:00,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:00,932 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:00,944 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:02:00,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:00,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:00,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:00,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:00,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:00,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:00,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:00,969 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:02,256 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:02:02,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:02,256 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:02,256 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:02:02,256 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:02:02,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:02:02,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2018-10-01 00:02:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:02:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:02:02,835 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:02:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:02,835 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:02:02,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:02,836 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:02:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:02,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:02,836 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:02,836 INFO L423 AbstractCegarLoop]: === Iteration 418 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:02,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:02,836 INFO L82 PathProgramCache]: Analyzing trace with hash -563304130, now seen corresponding path program 402 times [2018-10-01 00:02:02,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:02,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:02,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:02,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:02,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:02,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:02,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:02,910 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:02,919 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:02:02,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:02,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:02,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:02,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:02,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:02,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:02,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:02,944 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:02:04,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:04,195 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:02:04,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:04,195 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:04,195 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:02:04,195 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:02:04,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:02:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 00:02:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:04,806 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:04,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:04,806 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:04,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:04,806 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:04,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:04,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:04,807 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:02:04,807 INFO L423 AbstractCegarLoop]: === Iteration 419 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:04,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:04,807 INFO L82 PathProgramCache]: Analyzing trace with hash -563302208, now seen corresponding path program 403 times [2018-10-01 00:02:04,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:04,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:04,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:04,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:04,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:04,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:04,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:04,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:04,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:04,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:04,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:04,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:04,919 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:06,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:06,157 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:02:06,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:06,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:06,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:06,157 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:02:06,157 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:02:06,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:06,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:02:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 32. [2018-10-01 00:02:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:02:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:02:06,724 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:02:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:06,724 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:02:06,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:06,724 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:02:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:06,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:06,724 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:06,725 INFO L423 AbstractCegarLoop]: === Iteration 420 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:06,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:06,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1209856190, now seen corresponding path program 404 times [2018-10-01 00:02:06,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:06,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:06,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:06,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:06,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:06,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:06,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:06,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:02:06,806 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:02:06,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:06,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:06,809 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:06,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:06,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:06,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:06,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:06,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:06,830 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:02:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:08,041 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:02:08,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:08,041 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:08,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:08,041 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:02:08,041 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:02:08,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:08,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:02:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 00:02:08,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:08,608 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:08,608 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:08,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:08,608 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:08,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:08,608 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:02:08,608 INFO L423 AbstractCegarLoop]: === Iteration 421 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:08,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:08,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1209858112, now seen corresponding path program 405 times [2018-10-01 00:02:08,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:08,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:08,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:08,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:08,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:08,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:08,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:08,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:02:08,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:02:08,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:08,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:08,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:08,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:08,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:08,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:08,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:08,721 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:09,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:09,937 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:02:09,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:09,937 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:09,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:09,938 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:02:09,938 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:02:09,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:09,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:02:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2018-10-01 00:02:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:02:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:02:10,507 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:02:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:10,507 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:02:10,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:02:10,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:10,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:10,508 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:02:10,508 INFO L423 AbstractCegarLoop]: === Iteration 422 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:10,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:10,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1211703232, now seen corresponding path program 406 times [2018-10-01 00:02:10,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:10,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:10,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:10,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:10,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:10,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:10,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:10,583 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:02:10,589 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:02:10,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:10,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:10,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:10,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:10,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:10,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:10,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:10,613 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:02:11,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:11,789 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:02:11,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:11,789 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:11,790 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:02:11,790 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:02:11,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:02:12,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 00:02:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:12,367 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:12,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:12,367 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:12,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:12,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:12,368 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:12,368 INFO L423 AbstractCegarLoop]: === Iteration 423 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:12,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:12,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1211705154, now seen corresponding path program 407 times [2018-10-01 00:02:12,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:12,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:12,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:12,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:12,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:12,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:12,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:12,454 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:12,467 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:02:12,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:12,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:12,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:12,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:12,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:12,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:12,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:12,491 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:13,638 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:02:13,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:13,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:13,638 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:02:13,639 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:02:13,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:02:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 30. [2018-10-01 00:02:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:02:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:02:14,152 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:02:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:14,152 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:02:14,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:02:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:14,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:14,152 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:14,153 INFO L423 AbstractCegarLoop]: === Iteration 424 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:14,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:14,153 INFO L82 PathProgramCache]: Analyzing trace with hash 114907198, now seen corresponding path program 408 times [2018-10-01 00:02:14,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:14,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:14,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:14,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:14,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:14,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:14,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:14,227 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:14,239 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:02:14,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:14,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:14,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:14,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:14,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:14,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:14,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:14,262 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:02:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:15,568 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:02:15,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:15,568 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:15,569 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:02:15,569 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:02:15,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:02:16,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 00:02:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:16,181 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:16,182 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:16,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:16,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:16,182 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:02:16,182 INFO L423 AbstractCegarLoop]: === Iteration 425 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:16,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:16,182 INFO L82 PathProgramCache]: Analyzing trace with hash 114909120, now seen corresponding path program 409 times [2018-10-01 00:02:16,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:16,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:16,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:16,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:16,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:16,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:16,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:16,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:16,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:16,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:16,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:16,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:16,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:16,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:16,323 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:17,545 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:02:17,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:17,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:17,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:17,545 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:02:17,545 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:02:17,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:02:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2018-10-01 00:02:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:02:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:02:18,094 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:02:18,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:18,094 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:02:18,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:02:18,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:18,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:18,094 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:02:18,094 INFO L423 AbstractCegarLoop]: === Iteration 426 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:18,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:18,095 INFO L82 PathProgramCache]: Analyzing trace with hash 116754240, now seen corresponding path program 410 times [2018-10-01 00:02:18,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:18,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:18,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:18,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:18,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:18,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:18,166 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:18,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:02:18,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:02:18,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:18,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:18,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:18,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:18,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:18,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:18,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:18,201 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:02:19,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:19,509 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:02:19,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:19,509 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:19,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:19,509 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:02:19,509 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:02:19,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:02:20,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 00:02:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:20,077 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:20,077 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:20,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:20,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:20,077 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:20,077 INFO L423 AbstractCegarLoop]: === Iteration 427 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:20,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:20,078 INFO L82 PathProgramCache]: Analyzing trace with hash 116756162, now seen corresponding path program 411 times [2018-10-01 00:02:20,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:20,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:20,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:20,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:20,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:20,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:20,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:20,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:02:20,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:02:20,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:20,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:20,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:20,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:20,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:20,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:20,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:20,187 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:21,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:21,461 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:02:21,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:21,461 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:21,461 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:02:21,461 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:02:21,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:02:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 32. [2018-10-01 00:02:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:02:22,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:02:22,038 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:02:22,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:22,038 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:02:22,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:02:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:22,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:22,039 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:02:22,039 INFO L423 AbstractCegarLoop]: === Iteration 428 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:22,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:22,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1889914560, now seen corresponding path program 412 times [2018-10-01 00:02:22,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:22,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:22,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:22,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:22,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:22,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:22,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:22,113 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:02:22,119 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:02:22,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:22,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:22,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:22,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:22,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:22,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:22,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:22,143 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:02:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:23,307 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:02:23,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:23,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:23,308 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:02:23,308 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:02:23,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:02:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 00:02:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:23,872 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:23,872 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:23,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:23,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:23,872 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:23,872 INFO L423 AbstractCegarLoop]: === Iteration 429 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:23,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:23,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1889916482, now seen corresponding path program 413 times [2018-10-01 00:02:23,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:23,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:23,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:23,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:23,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:23,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:23,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:23,971 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:23,981 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:02:23,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:23,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:24,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:24,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:24,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:24,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:24,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:24,005 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:25,215 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:02:25,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:25,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:25,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:25,215 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:02:25,215 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:02:25,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:02:25,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2018-10-01 00:02:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:02:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:02:25,765 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:02:25,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:25,765 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:02:25,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:02:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:25,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:25,765 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:25,765 INFO L423 AbstractCegarLoop]: === Iteration 430 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:25,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:25,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1891761602, now seen corresponding path program 414 times [2018-10-01 00:02:25,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:25,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:25,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:25,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:25,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:25,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:25,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:25,840 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:25,850 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:02:25,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:25,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:25,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:25,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:25,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:25,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:25,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:25,875 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:02:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:27,083 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:02:27,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:27,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:27,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:27,084 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:02:27,084 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:02:27,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:02:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 00:02:27,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:27,690 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:27,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:27,690 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:27,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:27,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:27,690 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:02:27,691 INFO L423 AbstractCegarLoop]: === Iteration 431 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:27,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1891763524, now seen corresponding path program 415 times [2018-10-01 00:02:27,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:27,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:27,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:27,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:27,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:27,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:27,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:27,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:27,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:27,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:27,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:27,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:27,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:27,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:27,793 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:28,925 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:02:28,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:28,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:28,925 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:02:28,925 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:02:28,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:28,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:02:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 28. [2018-10-01 00:02:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:02:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 00:02:29,399 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 00:02:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:29,399 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 00:02:29,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 00:02:29,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:29,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:29,400 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:29,400 INFO L423 AbstractCegarLoop]: === Iteration 432 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:29,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:29,400 INFO L82 PathProgramCache]: Analyzing trace with hash 135913406, now seen corresponding path program 416 times [2018-10-01 00:02:29,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:29,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:29,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:29,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:29,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:29,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:29,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:29,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:02:29,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:02:29,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:29,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:29,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:29,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:29,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:29,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:29,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:29,502 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 00:02:30,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:30,723 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:02:30,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:30,723 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:30,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:30,724 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:02:30,724 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:02:30,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:30,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:02:31,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 00:02:31,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:31,306 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:31,306 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:31,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:31,307 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:31,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:31,307 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:02:31,307 INFO L423 AbstractCegarLoop]: === Iteration 433 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:31,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash 135915328, now seen corresponding path program 417 times [2018-10-01 00:02:31,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:31,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:31,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:31,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:31,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:31,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:31,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:31,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:02:31,413 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:02:31,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:31,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:31,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:31,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:31,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:31,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:31,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:31,437 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:32,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:32,616 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:02:32,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:32,616 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:32,617 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:02:32,617 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:02:32,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:32,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:02:33,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2018-10-01 00:02:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:02:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:02:33,190 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:02:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:33,190 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:02:33,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:02:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:33,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:33,191 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:02:33,191 INFO L423 AbstractCegarLoop]: === Iteration 434 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:33,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:33,191 INFO L82 PathProgramCache]: Analyzing trace with hash 137760448, now seen corresponding path program 418 times [2018-10-01 00:02:33,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:33,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:33,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:33,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:33,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:33,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:33,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:33,263 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:02:33,268 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:02:33,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:33,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:33,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:33,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:33,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:33,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:33,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:33,293 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:02:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:34,439 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:02:34,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:34,439 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:34,439 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:02:34,439 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:02:34,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:02:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 00:02:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:35,023 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:35,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:35,023 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:35,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:35,023 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:35,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:35,024 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:35,024 INFO L423 AbstractCegarLoop]: === Iteration 435 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:35,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:35,024 INFO L82 PathProgramCache]: Analyzing trace with hash 137762370, now seen corresponding path program 419 times [2018-10-01 00:02:35,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:35,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:35,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:35,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:35,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:35,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:35,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:35,110 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:35,119 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:02:35,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:35,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:35,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:35,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:35,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:35,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:35,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:35,143 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:36,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:36,266 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:02:36,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:36,266 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:36,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:36,266 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:02:36,266 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:02:36,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:02:36,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 00:02:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:02:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:02:36,803 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:02:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:36,803 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:02:36,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:36,803 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:02:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:36,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:36,804 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:02:36,804 INFO L423 AbstractCegarLoop]: === Iteration 436 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:36,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1910920768, now seen corresponding path program 420 times [2018-10-01 00:02:36,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:36,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:36,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:36,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:36,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:36,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:36,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:36,891 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:36,902 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:02:36,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:36,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:36,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:36,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:36,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:36,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:36,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:36,926 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:02:38,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:38,136 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:02:38,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:38,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:38,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:38,137 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:02:38,137 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:02:38,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:02:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 00:02:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:38,752 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:38,752 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:38,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:38,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:38,752 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:38,752 INFO L423 AbstractCegarLoop]: === Iteration 437 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:38,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:38,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1910922690, now seen corresponding path program 421 times [2018-10-01 00:02:38,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:38,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:38,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:38,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:38,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:38,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:38,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:38,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:38,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:38,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:38,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:38,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:38,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:38,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:38,858 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:40,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:40,046 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:02:40,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:40,046 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:40,046 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:02:40,046 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:02:40,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:02:40,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2018-10-01 00:02:40,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:02:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:02:40,613 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:02:40,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:40,614 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:02:40,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:40,614 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:02:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:40,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:40,614 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:40,614 INFO L423 AbstractCegarLoop]: === Iteration 438 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:40,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:40,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1912767810, now seen corresponding path program 422 times [2018-10-01 00:02:40,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:40,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:40,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:40,615 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:40,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:40,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:40,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:40,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:02:40,698 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:02:40,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:40,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:40,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:40,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:40,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:40,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:40,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:40,722 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:02:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:41,896 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:02:41,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:41,896 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:41,896 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:02:41,897 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:02:41,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:02:42,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 00:02:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:42,496 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:42,497 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:42,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:42,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:42,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:42,497 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:02:42,497 INFO L423 AbstractCegarLoop]: === Iteration 439 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:42,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:42,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1912769732, now seen corresponding path program 423 times [2018-10-01 00:02:42,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:42,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:42,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:42,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:42,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:42,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:42,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:42,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:02:42,580 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:02:42,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:42,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:42,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:42,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:42,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:42,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:42,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:42,604 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:43,726 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:02:43,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:43,726 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:43,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:43,727 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:02:43,727 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:02:43,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:02:44,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 30. [2018-10-01 00:02:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:02:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:02:44,230 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:02:44,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:44,230 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:02:44,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:02:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:44,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:44,230 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:02:44,231 INFO L423 AbstractCegarLoop]: === Iteration 440 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:44,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:44,231 INFO L82 PathProgramCache]: Analyzing trace with hash 815971776, now seen corresponding path program 424 times [2018-10-01 00:02:44,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:44,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:44,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:44,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:44,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:44,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:44,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:44,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:44,307 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:02:44,314 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:02:44,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:44,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:44,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:44,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:44,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:44,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:44,339 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:02:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:45,427 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:02:45,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:45,427 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:45,427 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:02:45,427 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:02:45,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:02:46,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 00:02:46,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:46,059 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:46,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:46,059 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:46,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:46,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:46,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:46,060 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:46,060 INFO L423 AbstractCegarLoop]: === Iteration 441 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:46,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:46,060 INFO L82 PathProgramCache]: Analyzing trace with hash 815973698, now seen corresponding path program 425 times [2018-10-01 00:02:46,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:46,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:46,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:46,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:46,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:46,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:46,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:46,137 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:46,146 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:02:46,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:46,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:46,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:46,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:46,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:46,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:46,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:46,180 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:47,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:47,299 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:02:47,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:47,299 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:47,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:47,299 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:02:47,299 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:02:47,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:47,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:02:47,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 00:02:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:02:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:02:47,910 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:02:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:47,911 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:02:47,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:02:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:47,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:47,911 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:47,911 INFO L423 AbstractCegarLoop]: === Iteration 442 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:47,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:47,911 INFO L82 PathProgramCache]: Analyzing trace with hash 817818818, now seen corresponding path program 426 times [2018-10-01 00:02:47,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:47,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:47,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:47,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:47,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:47,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:47,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:47,985 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:47,994 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:02:47,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:47,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:48,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:48,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:48,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:48,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:48,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:48,023 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:02:49,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:49,145 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:02:49,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:49,145 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:49,146 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:02:49,146 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:02:49,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:02:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 00:02:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:49,800 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:49,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:49,800 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:49,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:49,800 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:49,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:49,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:49,800 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:02:49,800 INFO L423 AbstractCegarLoop]: === Iteration 443 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:49,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:49,800 INFO L82 PathProgramCache]: Analyzing trace with hash 817820740, now seen corresponding path program 427 times [2018-10-01 00:02:49,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:49,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:49,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:49,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:49,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:49,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:49,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:49,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:49,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:49,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:49,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:49,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:49,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:49,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:49,915 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:50,962 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:02:50,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:50,962 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:50,963 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:02:50,963 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:02:50,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:50,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:02:51,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-01 00:02:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:02:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:02:51,504 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:02:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:51,504 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:02:51,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:51,504 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:02:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:51,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:51,504 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:02:51,504 INFO L423 AbstractCegarLoop]: === Iteration 444 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:51,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1703988158, now seen corresponding path program 428 times [2018-10-01 00:02:51,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:51,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:51,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:51,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:02:51,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:51,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:51,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:51,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:02:51,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:02:51,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:51,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:51,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:51,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:51,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:51,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:51,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:51,616 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:02:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:52,612 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:02:52,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:52,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:52,612 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:02:52,612 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:02:52,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:02:53,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 00:02:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:53,245 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:53,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:53,246 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:53,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:53,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:53,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:53,246 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:02:53,246 INFO L423 AbstractCegarLoop]: === Iteration 445 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:53,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:53,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1703986236, now seen corresponding path program 429 times [2018-10-01 00:02:53,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:53,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:53,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:53,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:53,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:53,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:53,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:53,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:02:53,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:02:53,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:53,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:53,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:53,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:53,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:53,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:53,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:53,358 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:54,388 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:02:54,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:54,388 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:54,389 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:02:54,389 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:02:54,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:54,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:02:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 00:02:54,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:02:54,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:02:54,992 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:02:54,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:54,992 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:02:54,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:54,992 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:02:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:54,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:54,993 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:02:54,993 INFO L423 AbstractCegarLoop]: === Iteration 446 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:54,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:54,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1702141116, now seen corresponding path program 430 times [2018-10-01 00:02:54,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:54,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:54,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:54,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:54,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:55,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:55,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:55,065 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:02:55,070 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:02:55,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:55,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:55,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:55,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:55,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:55,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:55,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:55,097 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:02:56,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:56,090 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:02:56,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:56,090 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:56,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:56,090 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:02:56,090 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:02:56,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:56,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:02:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2018-10-01 00:02:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:02:56,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:02:56,684 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:02:56,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:56,684 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:02:56,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:56,684 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:02:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:56,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:56,684 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 00:02:56,684 INFO L423 AbstractCegarLoop]: === Iteration 447 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:56,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:56,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1702139194, now seen corresponding path program 431 times [2018-10-01 00:02:56,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:56,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:56,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:56,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:56,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:56,752 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:56,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:56,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:56,761 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:02:56,770 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:02:56,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:56,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:56,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:56,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:56,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:56,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:56,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:56,793 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:02:57,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:57,723 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:02:57,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:57,723 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:57,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:57,724 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:02:57,724 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:02:57,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:02:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 24. [2018-10-01 00:02:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-01 00:02:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-01 00:02:58,129 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-10-01 00:02:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:02:58,129 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-01 00:02:58,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:02:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-01 00:02:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:02:58,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:02:58,129 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:02:58,129 INFO L423 AbstractCegarLoop]: === Iteration 448 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:02:58,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:02:58,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1258208836, now seen corresponding path program 432 times [2018-10-01 00:02:58,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:02:58,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:02:58,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:58,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:02:58,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:02:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:02:58,316 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:58,316 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:02:58,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:02:58,325 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:02:58,334 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:02:58,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:02:58,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:02:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:02:58,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:02:58,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:02:58,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:02:58,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:02:58,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:58,359 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-10-01 00:02:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:02:59,593 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:02:59,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:02:59,593 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:02:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:02:59,594 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:02:59,594 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:02:59,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:02:59,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:03:00,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 00:03:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:00,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:00,267 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:00,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:00,267 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:00,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:00,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:00,268 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:00,268 INFO L423 AbstractCegarLoop]: === Iteration 449 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:00,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1258206914, now seen corresponding path program 433 times [2018-10-01 00:03:00,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:00,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:00,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:00,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:00,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:00,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:00,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:00,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:00,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:00,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:00,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:00,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:00,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:00,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:00,380 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:01,618 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:03:01,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:01,618 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:01,619 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:03:01,619 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:03:01,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:03:02,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2018-10-01 00:03:02,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:03:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:03:02,301 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:03:02,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:02,302 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:03:02,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:03:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:02,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:02,305 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:02,305 INFO L423 AbstractCegarLoop]: === Iteration 450 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:02,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:02,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1256361794, now seen corresponding path program 434 times [2018-10-01 00:03:02,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:02,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:02,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:02,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:02,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:02,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:02,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:02,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:03:02,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:03:02,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:02,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:02,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:02,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:02,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:02,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:02,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:02,420 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:03:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:03,638 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:03:03,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:03,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:03,639 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:03:03,639 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:03:03,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:03:04,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 00:03:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:04,324 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:04,324 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:04,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:04,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:04,324 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:03:04,324 INFO L423 AbstractCegarLoop]: === Iteration 451 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:04,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1256359872, now seen corresponding path program 435 times [2018-10-01 00:03:04,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:04,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:04,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:04,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:04,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:04,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:04,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:04,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:03:04,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:03:04,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:04,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:04,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:04,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:04,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:04,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:04,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:04,434 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:05,581 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:03:05,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:05,581 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:05,581 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:03:05,581 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:03:05,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:03:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-01 00:03:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:03:06,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:03:06,176 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:03:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:06,176 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:03:06,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:03:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:06,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:06,176 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:06,177 INFO L423 AbstractCegarLoop]: === Iteration 452 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:06,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:06,177 INFO L82 PathProgramCache]: Analyzing trace with hash 516798526, now seen corresponding path program 436 times [2018-10-01 00:03:06,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:06,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:06,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:06,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:06,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:06,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:06,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:06,254 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:03:06,259 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:03:06,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:06,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:06,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:06,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:06,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:06,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:06,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:06,282 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:03:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:07,539 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:03:07,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:07,539 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:07,539 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:03:07,539 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:03:07,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:07,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:03:08,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 00:03:08,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:08,448 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:08,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:08,448 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:08,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:08,448 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:08,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:08,449 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:03:08,449 INFO L423 AbstractCegarLoop]: === Iteration 453 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:08,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:08,449 INFO L82 PathProgramCache]: Analyzing trace with hash 516800448, now seen corresponding path program 437 times [2018-10-01 00:03:08,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:08,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:08,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:08,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:08,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:08,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:08,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:08,623 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:03:08,632 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:03:08,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:08,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:08,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:08,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:08,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:08,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:08,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:08,657 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:09,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:09,860 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:03:09,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:09,860 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:09,861 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:03:09,861 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:03:09,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:09,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:03:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2018-10-01 00:03:10,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:03:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:03:10,538 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:03:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:10,538 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:03:10,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:03:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:10,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:10,539 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:03:10,539 INFO L423 AbstractCegarLoop]: === Iteration 454 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:10,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:10,539 INFO L82 PathProgramCache]: Analyzing trace with hash 518645568, now seen corresponding path program 438 times [2018-10-01 00:03:10,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:10,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:10,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:10,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:10,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:10,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:10,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:10,613 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:03:10,620 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:03:10,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:10,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:10,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:10,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:10,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:10,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:10,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:10,644 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:03:11,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:11,844 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:03:11,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:11,844 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:11,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:11,845 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:03:11,845 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:03:11,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:03:12,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 00:03:12,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:12,533 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:12,534 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:12,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:12,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:12,534 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:12,534 INFO L423 AbstractCegarLoop]: === Iteration 455 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:12,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:12,534 INFO L82 PathProgramCache]: Analyzing trace with hash 518647490, now seen corresponding path program 439 times [2018-10-01 00:03:12,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:12,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:12,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:12,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:12,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:12,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:12,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:12,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:12,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:12,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:12,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:12,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:12,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:12,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:12,750 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:13,934 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:03:13,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:13,934 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:13,934 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:03:13,934 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:03:13,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:13,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:03:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-01 00:03:14,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:03:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:03:14,543 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:03:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:14,544 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:03:14,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:14,544 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:03:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:14,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:14,544 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:14,544 INFO L423 AbstractCegarLoop]: === Iteration 456 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:14,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:14,544 INFO L82 PathProgramCache]: Analyzing trace with hash -578150466, now seen corresponding path program 440 times [2018-10-01 00:03:14,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:14,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:14,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:14,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:14,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:14,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:14,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:14,624 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:03:14,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:03:14,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:14,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:14,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:14,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:14,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:14,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:14,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:14,656 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:03:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:15,785 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:03:15,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:15,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:15,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:15,785 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:03:15,785 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:03:15,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:15,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:03:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 00:03:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:16,450 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:16,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:16,450 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:16,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:16,450 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:16,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:16,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:16,450 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:03:16,450 INFO L423 AbstractCegarLoop]: === Iteration 457 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:16,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:16,451 INFO L82 PathProgramCache]: Analyzing trace with hash -578148544, now seen corresponding path program 441 times [2018-10-01 00:03:16,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:16,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:16,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:16,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:16,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:16,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:16,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:16,528 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:03:16,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:03:16,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:16,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:16,562 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:16,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:16,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:16,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:16,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:16,563 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:17,678 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:03:17,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:17,678 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:17,678 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:03:17,678 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:03:17,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:17,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:03:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 00:03:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:03:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:03:18,339 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:03:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:18,339 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:03:18,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:03:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:18,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:18,339 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:03:18,340 INFO L423 AbstractCegarLoop]: === Iteration 458 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:18,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:18,340 INFO L82 PathProgramCache]: Analyzing trace with hash -576303424, now seen corresponding path program 442 times [2018-10-01 00:03:18,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:18,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:18,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:18,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:18,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:18,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:18,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:18,416 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:03:18,423 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:03:18,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:18,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:18,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:18,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:18,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:18,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:18,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:18,448 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:03:19,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:19,635 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:03:19,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:19,635 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:19,635 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:03:19,635 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:03:19,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:03:20,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 00:03:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:20,273 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:20,273 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:20,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:20,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:20,273 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:20,273 INFO L423 AbstractCegarLoop]: === Iteration 459 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:20,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:20,273 INFO L82 PathProgramCache]: Analyzing trace with hash -576301502, now seen corresponding path program 443 times [2018-10-01 00:03:20,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:20,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:20,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:20,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:20,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:20,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:20,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:20,350 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:03:20,360 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:03:20,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:20,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:20,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:20,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:20,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:20,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:20,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:20,386 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:21,493 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:03:21,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:21,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:21,494 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:03:21,494 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:03:21,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:03:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-01 00:03:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:03:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:03:22,133 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:03:22,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:22,133 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:03:22,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:22,133 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:03:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:22,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:22,134 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:03:22,134 INFO L423 AbstractCegarLoop]: === Iteration 460 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:22,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:22,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1196856896, now seen corresponding path program 444 times [2018-10-01 00:03:22,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:22,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:22,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:22,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:22,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:22,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:22,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:22,211 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:03:22,221 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:03:22,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:22,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:22,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:22,246 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:22,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:22,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:22,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:22,247 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:03:23,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:23,336 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:03:23,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:23,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:23,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:23,336 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:03:23,336 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:03:23,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:23,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:03:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2018-10-01 00:03:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:24,037 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:24,037 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:24,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:24,037 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:24,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:24,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:24,038 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:24,038 INFO L423 AbstractCegarLoop]: === Iteration 461 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:24,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:24,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1196858818, now seen corresponding path program 445 times [2018-10-01 00:03:24,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:24,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:24,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:24,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:24,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:24,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:24,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:24,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:24,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:24,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:24,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:24,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:24,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:24,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:24,140 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:25,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:25,223 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:03:25,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:25,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:25,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:25,224 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:03:25,224 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:03:25,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:03:25,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 00:03:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:03:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:03:25,849 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:03:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:25,849 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:03:25,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:03:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:25,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:25,849 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:25,850 INFO L423 AbstractCegarLoop]: === Iteration 462 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:25,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:25,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1198703938, now seen corresponding path program 446 times [2018-10-01 00:03:25,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:25,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:25,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:25,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:25,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:25,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:25,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:25,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:03:25,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:03:25,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:25,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:25,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:25,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:25,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:25,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:25,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:25,957 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:03:26,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:26,981 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:03:26,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:26,981 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:26,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:26,982 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:03:26,982 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:03:26,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:03:27,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2018-10-01 00:03:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:27,656 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:27,656 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:27,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:27,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:27,656 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:03:27,657 INFO L423 AbstractCegarLoop]: === Iteration 463 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:27,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:27,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1198705860, now seen corresponding path program 447 times [2018-10-01 00:03:27,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:27,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:27,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:27,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:27,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:27,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:27,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:27,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:03:27,821 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:03:27,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:27,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:27,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:27,844 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:27,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:27,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:27,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:27,845 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:28,827 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:03:28,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:28,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:28,827 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:03:28,827 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:03:28,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:03:29,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-10-01 00:03:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:03:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 00:03:29,380 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 00:03:29,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:29,380 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 00:03:29,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:29,380 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 00:03:29,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:29,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:29,380 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:29,380 INFO L423 AbstractCegarLoop]: === Iteration 464 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:29,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:29,381 INFO L82 PathProgramCache]: Analyzing trace with hash -557144258, now seen corresponding path program 448 times [2018-10-01 00:03:29,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:29,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:29,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:29,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:29,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:29,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:29,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:29,456 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:03:29,466 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:03:29,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:29,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:29,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:29,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:29,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:29,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:29,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:29,488 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 00:03:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:30,802 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:03:30,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:30,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:30,802 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:03:30,802 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:03:30,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:03:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 00:03:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:31,478 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:31,478 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:31,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:31,479 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:31,479 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:03:31,479 INFO L423 AbstractCegarLoop]: === Iteration 465 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:31,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:31,479 INFO L82 PathProgramCache]: Analyzing trace with hash -557142336, now seen corresponding path program 449 times [2018-10-01 00:03:31,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:31,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:31,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:31,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:31,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:31,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:31,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:31,553 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:03:31,562 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:03:31,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:31,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:31,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:31,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:31,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:31,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:31,586 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:32,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:32,903 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:03:32,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:32,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:32,903 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:03:32,903 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:03:32,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:32,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:03:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2018-10-01 00:03:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:03:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:03:33,599 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:03:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:33,599 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:03:33,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:03:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:33,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:33,599 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:03:33,599 INFO L423 AbstractCegarLoop]: === Iteration 466 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:33,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash -555297216, now seen corresponding path program 450 times [2018-10-01 00:03:33,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:33,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:33,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:33,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:33,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:33,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:33,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:33,681 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:03:33,690 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:03:33,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:33,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:33,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:33,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:33,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:33,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:33,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:33,714 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:03:34,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:34,979 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:03:34,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:34,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:34,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:34,980 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:03:34,980 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:03:34,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:34,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:03:35,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 00:03:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:35,696 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:35,697 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:35,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:35,697 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:35,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:35,697 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:35,697 INFO L423 AbstractCegarLoop]: === Iteration 467 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:35,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:35,697 INFO L82 PathProgramCache]: Analyzing trace with hash -555295294, now seen corresponding path program 451 times [2018-10-01 00:03:35,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:35,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:35,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:35,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:35,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:35,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:35,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:35,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:35,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:35,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:35,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:35,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:35,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:35,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:35,803 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:37,007 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:03:37,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:37,007 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:37,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:37,007 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:03:37,008 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:03:37,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:03:37,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-01 00:03:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:03:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:03:37,658 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:03:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:37,658 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:03:37,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:03:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:37,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:37,658 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:03:37,658 INFO L423 AbstractCegarLoop]: === Iteration 468 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:37,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:37,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1217863104, now seen corresponding path program 452 times [2018-10-01 00:03:37,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:37,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:37,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:37,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:37,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:37,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:37,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:37,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:03:37,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:03:37,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:37,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:37,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:37,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:37,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:37,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:37,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:37,765 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:03:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:39,074 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:03:39,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:39,074 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:39,074 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:03:39,074 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:03:39,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:03:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2018-10-01 00:03:39,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:39,786 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:39,786 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:39,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:39,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:39,786 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:39,787 INFO L423 AbstractCegarLoop]: === Iteration 469 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:39,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:39,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1217865026, now seen corresponding path program 453 times [2018-10-01 00:03:39,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:39,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:39,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:39,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:39,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:39,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:39,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:39,863 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:03:39,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:03:39,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:39,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:39,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:39,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:39,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:39,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:39,896 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:41,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:41,224 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:03:41,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:41,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:41,224 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:03:41,224 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:03:41,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:41,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:03:41,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2018-10-01 00:03:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:03:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:03:41,914 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:03:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:41,915 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:03:41,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:03:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:41,915 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:41,915 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:41,915 INFO L423 AbstractCegarLoop]: === Iteration 470 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:41,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:41,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1219710146, now seen corresponding path program 454 times [2018-10-01 00:03:41,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:41,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:41,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:41,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:41,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:41,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:41,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:41,994 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:03:42,001 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:03:42,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:42,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:42,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:42,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:42,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:42,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:42,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:42,024 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:03:43,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:43,294 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:03:43,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:43,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:43,295 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:03:43,295 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:03:43,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:03:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 00:03:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:43,988 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:43,988 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:43,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:43,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:43,988 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:03:43,988 INFO L423 AbstractCegarLoop]: === Iteration 471 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:43,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:43,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1219712068, now seen corresponding path program 455 times [2018-10-01 00:03:43,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:43,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:43,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:43,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:43,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:44,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:44,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:44,062 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:03:44,072 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:03:44,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:44,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:44,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:44,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:44,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:44,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:44,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:44,096 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:45,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:45,316 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:03:45,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:45,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:45,316 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:03:45,316 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:03:45,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:03:45,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-01 00:03:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:03:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:03:45,902 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:03:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:45,903 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:03:45,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:45,903 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:03:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:45,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:45,903 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:03:45,903 INFO L423 AbstractCegarLoop]: === Iteration 472 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:45,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:45,903 INFO L82 PathProgramCache]: Analyzing trace with hash 122914112, now seen corresponding path program 456 times [2018-10-01 00:03:45,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:45,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:45,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:45,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:45,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:45,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:45,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:45,980 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:03:45,989 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:03:45,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:45,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:46,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:46,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:46,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:46,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:46,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:46,013 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:03:47,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:47,230 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:03:47,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:47,230 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:47,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:47,230 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:03:47,230 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:03:47,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:47,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:03:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 00:03:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:47,921 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:47,921 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:47,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:47,921 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:47,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:47,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:47,921 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:47,921 INFO L423 AbstractCegarLoop]: === Iteration 473 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:47,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash 122916034, now seen corresponding path program 457 times [2018-10-01 00:03:47,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:47,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:47,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:47,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:47,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:47,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:47,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:47,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:48,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:48,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:48,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:48,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:48,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:48,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:48,027 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:49,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:49,140 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:03:49,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:49,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:49,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:49,140 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:03:49,140 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:03:49,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:03:49,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 00:03:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:03:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:03:49,830 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:03:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:49,830 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:03:49,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:49,830 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:03:49,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:49,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:49,830 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:49,830 INFO L423 AbstractCegarLoop]: === Iteration 474 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:49,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:49,831 INFO L82 PathProgramCache]: Analyzing trace with hash 124761154, now seen corresponding path program 458 times [2018-10-01 00:03:49,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:49,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:49,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:49,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:49,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:49,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:49,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:49,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:03:49,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:03:49,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:49,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:49,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:49,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:49,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:49,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:49,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:49,934 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:03:51,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:51,104 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:03:51,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:51,104 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:51,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:51,105 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:03:51,105 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:03:51,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:51,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:03:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 00:03:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:51,797 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:51,797 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:51,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:51,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:51,798 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:03:51,798 INFO L423 AbstractCegarLoop]: === Iteration 475 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:51,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:51,798 INFO L82 PathProgramCache]: Analyzing trace with hash 124763076, now seen corresponding path program 459 times [2018-10-01 00:03:51,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:51,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:51,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:51,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:51,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:51,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:51,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:51,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:03:51,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:03:51,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:51,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:51,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:51,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:51,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:51,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:51,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:51,909 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:53,054 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:03:53,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:53,054 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:53,055 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:03:53,055 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:03:53,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:03:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-01 00:03:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:03:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:03:53,665 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:03:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:53,665 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:03:53,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:03:53,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:53,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:53,665 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:03:53,666 INFO L423 AbstractCegarLoop]: === Iteration 476 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:53,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:53,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1897921474, now seen corresponding path program 460 times [2018-10-01 00:03:53,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:53,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:53,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:53,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:53,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:53,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:53,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:53,743 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:03:53,749 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:03:53,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:53,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:53,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:53,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:53,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:53,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:53,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:53,771 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:03:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:54,878 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:03:54,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:54,878 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:54,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:54,878 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:03:54,878 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:03:54,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:54,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:03:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2018-10-01 00:03:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:55,572 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:55,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:55,572 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:55,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:55,572 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:55,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:55,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:55,573 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:03:55,573 INFO L423 AbstractCegarLoop]: === Iteration 477 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:55,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:55,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1897923396, now seen corresponding path program 461 times [2018-10-01 00:03:55,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:55,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:55,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:55,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:55,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:55,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:55,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:55,650 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:03:55,661 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:03:55,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:55,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:55,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:55,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:55,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:55,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:55,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:55,685 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:03:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:56,818 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:03:56,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:56,818 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:56,818 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:03:56,818 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:03:56,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:56,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:03:57,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 00:03:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:03:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:03:57,514 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:03:57,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:57,514 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:03:57,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:57,514 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:03:57,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:57,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:57,514 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:03:57,514 INFO L423 AbstractCegarLoop]: === Iteration 478 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:57,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:57,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1899768516, now seen corresponding path program 462 times [2018-10-01 00:03:57,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:57,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:57,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:57,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:57,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:57,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:57,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:57,599 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:03:57,611 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:03:57,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:03:57,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:57,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:57,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:57,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:57,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:57,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:57,634 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:03:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:03:58,697 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:03:58,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:03:58,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:03:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:03:58,697 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:03:58,697 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:03:58,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:03:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2018-10-01 00:03:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:03:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:03:59,409 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:03:59,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:03:59,409 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:03:59,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:03:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:03:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:03:59,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:03:59,409 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 00:03:59,409 INFO L423 AbstractCegarLoop]: === Iteration 479 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:03:59,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:03:59,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1899770438, now seen corresponding path program 463 times [2018-10-01 00:03:59,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:03:59,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:03:59,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:59,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:03:59,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:03:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:59,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:03:59,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:03:59,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:03:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:03:59,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:03:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:03:59,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:03:59,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:03:59,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:03:59,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:03:59,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:03:59,519 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:00,539 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:04:00,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:00,539 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:00,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:00,540 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:04:00,540 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:04:00,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:04:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 26. [2018-10-01 00:04:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 00:04:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 00:04:01,038 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-01 00:04:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:01,039 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 00:04:01,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:01,039 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 00:04:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:01,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:01,039 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:04:01,039 INFO L423 AbstractCegarLoop]: === Iteration 480 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:01,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1845014850, now seen corresponding path program 464 times [2018-10-01 00:04:01,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:01,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:01,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:01,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:01,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:01,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:01,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:01,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:01,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:01,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:01,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:01,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:01,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:01,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:01,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:01,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:01,143 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-01 00:04:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:02,282 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:04:02,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:02,282 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:02,282 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:04:02,282 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:04:02,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:04:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 00:04:02,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:02,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:02,958 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:02,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:02,958 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:02,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:02,959 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:02,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:02,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:02,959 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:04:02,959 INFO L423 AbstractCegarLoop]: === Iteration 481 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:02,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:02,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1845012928, now seen corresponding path program 465 times [2018-10-01 00:04:02,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:02,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:02,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:02,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:02,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:03,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:03,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:03,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:04:03,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:04:03,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:03,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:03,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:03,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:03,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:03,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:03,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:03,076 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:04,178 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:04:04,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:04,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:04,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:04,178 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:04:04,178 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:04:04,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:04:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 00:04:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:04:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:04:04,916 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:04:04,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:04,916 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:04:04,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:04,916 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:04:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:04,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:04,916 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:04:04,916 INFO L423 AbstractCegarLoop]: === Iteration 482 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:04,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1843167808, now seen corresponding path program 466 times [2018-10-01 00:04:04,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:04,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:04,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:04,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:04,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:04,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:04,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:04,997 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:04:05,003 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:04:05,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:05,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:05,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:05,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:05,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:05,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:05,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:05,027 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:04:06,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:06,191 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:04:06,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:06,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:06,191 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:04:06,191 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:04:06,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:04:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 00:04:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:06,882 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:06,882 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:06,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:06,882 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:06,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:06,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:06,882 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:04:06,882 INFO L423 AbstractCegarLoop]: === Iteration 483 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:06,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:06,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1843165886, now seen corresponding path program 467 times [2018-10-01 00:04:06,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:06,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:06,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:06,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:06,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:06,951 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:06,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:06,959 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:04:06,969 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:04:06,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:06,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:06,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:06,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:06,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:06,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:06,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:06,994 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:08,113 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:04:08,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:08,113 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:08,114 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:04:08,114 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:04:08,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:04:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 00:04:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:04:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:04:08,777 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:04:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:08,777 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:04:08,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:04:08,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:08,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:08,777 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:04:08,778 INFO L423 AbstractCegarLoop]: === Iteration 484 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:08,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:08,778 INFO L82 PathProgramCache]: Analyzing trace with hash -70007488, now seen corresponding path program 468 times [2018-10-01 00:04:08,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:08,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:08,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:08,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:08,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:08,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:08,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:08,856 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:04:08,870 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:04:08,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:08,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:08,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:08,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:08,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:08,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:08,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:08,893 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:04:09,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:09,979 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:04:09,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:09,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:09,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:09,979 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:04:09,979 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:04:09,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:09,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:04:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2018-10-01 00:04:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:10,683 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:10,683 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:10,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:10,684 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:10,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:10,684 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:04:10,684 INFO L423 AbstractCegarLoop]: === Iteration 485 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:10,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:10,684 INFO L82 PathProgramCache]: Analyzing trace with hash -70005566, now seen corresponding path program 469 times [2018-10-01 00:04:10,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:10,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:10,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:10,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:10,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:10,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:10,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:10,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:10,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:10,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:10,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:10,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:10,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:10,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:10,788 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:11,871 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:04:11,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:11,871 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:11,871 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:04:11,871 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:04:11,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:04:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-01 00:04:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:04:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:04:12,589 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:04:12,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:12,589 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:04:12,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:12,589 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:04:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:12,589 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:12,589 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:04:12,589 INFO L423 AbstractCegarLoop]: === Iteration 486 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:12,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:12,590 INFO L82 PathProgramCache]: Analyzing trace with hash -68160446, now seen corresponding path program 470 times [2018-10-01 00:04:12,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:12,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:12,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:12,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:12,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:12,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:12,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:12,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:12,675 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:12,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:12,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:12,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:12,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:12,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:12,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:12,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:12,699 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:04:13,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:13,750 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:04:13,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:13,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:13,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:13,750 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:04:13,750 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:04:13,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:13,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:04:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2018-10-01 00:04:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:14,453 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:14,454 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:14,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:14,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:14,454 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:04:14,454 INFO L423 AbstractCegarLoop]: === Iteration 487 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:14,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:14,454 INFO L82 PathProgramCache]: Analyzing trace with hash -68158524, now seen corresponding path program 471 times [2018-10-01 00:04:14,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:14,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:14,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:14,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:14,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:14,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:14,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:14,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:04:14,541 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:04:14,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:14,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:14,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:14,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:14,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:14,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:14,565 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:15,534 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:04:15,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:15,534 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:15,535 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:04:15,535 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:04:15,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:15,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:04:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-10-01 00:04:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:04:16,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:04:16,186 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:04:16,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:16,187 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:04:16,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:16,187 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:04:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:16,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:16,187 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:04:16,187 INFO L423 AbstractCegarLoop]: === Iteration 488 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:16,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1164956480, now seen corresponding path program 472 times [2018-10-01 00:04:16,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:16,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:16,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:16,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:16,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:16,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:16,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:16,264 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:04:16,269 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:04:16,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:16,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:16,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:16,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:16,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:16,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:16,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:16,293 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:04:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:17,481 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:04:17,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:17,481 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:17,481 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:04:17,481 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:04:17,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:04:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 00:04:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:18,168 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:18,168 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:18,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:18,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:18,169 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:04:18,169 INFO L423 AbstractCegarLoop]: === Iteration 489 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:18,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:18,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1164954558, now seen corresponding path program 473 times [2018-10-01 00:04:18,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:18,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:18,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:18,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:18,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:18,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:18,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:18,244 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:04:18,254 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:04:18,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:18,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:18,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:18,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:18,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:18,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:18,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:18,278 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:19,396 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:04:19,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:19,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:19,397 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:04:19,397 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:04:19,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:19,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:04:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-01 00:04:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:04:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:04:20,120 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:04:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:20,121 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:04:20,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:04:20,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:20,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:20,121 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:04:20,121 INFO L423 AbstractCegarLoop]: === Iteration 490 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:20,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:20,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1163109438, now seen corresponding path program 474 times [2018-10-01 00:04:20,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:20,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:20,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:20,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:20,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:20,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:20,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:20,202 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:04:20,213 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:04:20,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:20,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:20,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:20,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:20,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:20,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:20,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:20,236 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:04:21,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:21,456 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:04:21,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:21,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:21,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:21,456 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:04:21,456 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:04:21,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:21,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:04:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 00:04:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:22,211 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:22,211 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:22,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:22,211 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:22,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:22,211 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:04:22,211 INFO L423 AbstractCegarLoop]: === Iteration 491 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:22,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:22,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1163107516, now seen corresponding path program 475 times [2018-10-01 00:04:22,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:22,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:22,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:22,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:22,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:22,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:22,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:22,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:22,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:22,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:22,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:22,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:22,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:22,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:22,321 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:23,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:23,466 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:04:23,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:23,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:23,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:23,467 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:04:23,467 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:04:23,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:23,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:04:24,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-01 00:04:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:04:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:04:24,180 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:04:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:24,180 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:04:24,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:04:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:24,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:24,181 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:04:24,181 INFO L423 AbstractCegarLoop]: === Iteration 492 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:24,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:24,181 INFO L82 PathProgramCache]: Analyzing trace with hash 610050882, now seen corresponding path program 476 times [2018-10-01 00:04:24,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:24,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:24,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:24,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:24,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:24,283 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:24,283 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:24,290 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:24,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:24,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:24,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:24,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:24,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:24,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:24,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:24,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:24,320 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:04:25,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:25,417 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:04:25,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:25,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:25,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:25,418 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:04:25,418 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:04:25,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:04:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2018-10-01 00:04:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:26,173 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:26,173 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:26,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:26,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:26,174 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:04:26,174 INFO L423 AbstractCegarLoop]: === Iteration 493 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:26,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:26,174 INFO L82 PathProgramCache]: Analyzing trace with hash 610052804, now seen corresponding path program 477 times [2018-10-01 00:04:26,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:26,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:26,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:26,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:26,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:26,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:26,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:26,247 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:04:26,257 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:04:26,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:26,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:26,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:26,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:26,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:26,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:26,281 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:27,380 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:04:27,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:27,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:27,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:27,381 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:04:27,381 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:04:27,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:04:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-01 00:04:28,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:04:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:04:28,117 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:04:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:28,117 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:04:28,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:28,117 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:04:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:28,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:28,117 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:04:28,117 INFO L423 AbstractCegarLoop]: === Iteration 494 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:28,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:28,118 INFO L82 PathProgramCache]: Analyzing trace with hash 611897924, now seen corresponding path program 478 times [2018-10-01 00:04:28,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:28,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:28,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:28,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:28,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:28,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:28,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:28,191 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:04:28,197 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:04:28,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:28,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:28,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:28,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:28,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:28,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:28,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:28,222 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:04:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:29,280 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:04:29,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:29,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:29,280 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:04:29,281 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:04:29,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:29,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:04:29,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2018-10-01 00:04:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:29,960 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:29,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:29,960 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:29,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:29,960 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:29,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:29,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:29,961 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 00:04:29,961 INFO L423 AbstractCegarLoop]: === Iteration 495 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:29,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:29,961 INFO L82 PathProgramCache]: Analyzing trace with hash 611899846, now seen corresponding path program 479 times [2018-10-01 00:04:29,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:29,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:29,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:29,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:29,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:30,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:30,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:30,039 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:04:30,153 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:04:30,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:30,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:30,157 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:30,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:30,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:30,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:30,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:30,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:30,191 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:31,288 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:04:31,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:31,288 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:31,289 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:04:31,289 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:04:31,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:31,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:04:31,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-01 00:04:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:04:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 00:04:31,859 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-01 00:04:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:31,859 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 00:04:31,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:31,860 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 00:04:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:31,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:31,860 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-01 00:04:31,860 INFO L423 AbstractCegarLoop]: === Iteration 496 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:31,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:31,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1143950272, now seen corresponding path program 480 times [2018-10-01 00:04:31,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:31,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:31,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:31,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:31,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:31,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:31,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:31,943 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:04:31,955 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:04:31,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:31,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:31,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:31,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:31,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:31,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:31,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:31,980 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-01 00:04:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:33,035 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:04:33,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:33,035 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:33,035 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:04:33,035 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:04:33,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:04:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2018-10-01 00:04:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:33,800 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:33,800 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:33,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:33,801 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:33,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:33,801 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:04:33,801 INFO L423 AbstractCegarLoop]: === Iteration 497 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:33,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:33,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1143948350, now seen corresponding path program 481 times [2018-10-01 00:04:33,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:33,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:33,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:33,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:33,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:33,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:33,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:33,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:33,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:33,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:33,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:33,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:33,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:33,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:33,908 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:34,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:34,904 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:04:34,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:34,904 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:34,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:34,904 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:04:34,904 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:04:34,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:34,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:04:35,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 00:04:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:04:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:04:35,582 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:04:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:35,582 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:04:35,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:35,582 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:04:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:35,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:35,582 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:04:35,582 INFO L423 AbstractCegarLoop]: === Iteration 498 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:35,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:35,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1142103230, now seen corresponding path program 482 times [2018-10-01 00:04:35,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:35,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:35,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:35,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:35,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:35,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:35,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:35,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:35,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:35,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:35,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:35,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:35,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:35,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:35,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:35,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:35,691 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:04:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:36,769 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:04:36,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:36,769 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:36,769 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:04:36,769 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:04:36,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:04:37,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2018-10-01 00:04:37,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:37,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:37,525 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:37,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:37,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:37,525 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:04:37,525 INFO L423 AbstractCegarLoop]: === Iteration 499 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:37,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:37,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1142101308, now seen corresponding path program 483 times [2018-10-01 00:04:37,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:37,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:37,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:37,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:37,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:37,594 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:37,594 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:37,602 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:04:37,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:04:37,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:37,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:37,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:37,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:37,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:37,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:37,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:37,636 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:38,588 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 00:04:38,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:38,588 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:38,589 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:04:38,589 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:04:38,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:04:39,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-01 00:04:39,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:04:39,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:04:39,251 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:04:39,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:39,251 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:04:39,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:39,251 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:04:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:39,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:39,251 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:04:39,251 INFO L423 AbstractCegarLoop]: === Iteration 500 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:39,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:39,252 INFO L82 PathProgramCache]: Analyzing trace with hash 631057090, now seen corresponding path program 484 times [2018-10-01 00:04:39,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:39,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:39,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:39,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:39,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:39,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:39,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:39,469 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:04:39,481 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:04:39,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:39,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:39,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:39,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:39,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:39,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:39,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:39,504 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:04:40,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:40,592 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:04:40,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:40,592 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:40,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:40,592 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:04:40,592 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:04:40,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:04:41,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2018-10-01 00:04:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:41,296 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:41,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:41,296 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:41,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:41,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:41,297 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:04:41,297 INFO L423 AbstractCegarLoop]: === Iteration 501 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:41,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:41,297 INFO L82 PathProgramCache]: Analyzing trace with hash 631059012, now seen corresponding path program 485 times [2018-10-01 00:04:41,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:41,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:41,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:41,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:41,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:41,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:41,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:41,436 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:04:41,446 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:04:41,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:41,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:41,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:41,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:41,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:41,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:41,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:41,473 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:42,493 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:04:42,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:42,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:42,493 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:04:42,493 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:04:42,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:42,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:04:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-01 00:04:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:04:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:04:43,241 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:04:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:43,241 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:04:43,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:04:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:43,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:43,242 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:04:43,242 INFO L423 AbstractCegarLoop]: === Iteration 502 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:43,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:43,242 INFO L82 PathProgramCache]: Analyzing trace with hash 632904132, now seen corresponding path program 486 times [2018-10-01 00:04:43,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:43,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:43,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:43,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:43,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:43,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:43,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:43,326 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:04:43,338 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:04:43,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:43,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:43,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:43,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:43,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:43,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:43,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:43,363 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:04:44,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:44,368 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:04:44,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:44,368 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:44,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:44,369 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:04:44,369 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:04:44,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:04:45,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2018-10-01 00:04:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:45,142 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:45,142 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:45,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:45,142 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:45,142 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 00:04:45,142 INFO L423 AbstractCegarLoop]: === Iteration 503 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:45,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash 632906054, now seen corresponding path program 487 times [2018-10-01 00:04:45,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:45,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:45,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:45,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:45,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:45,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:45,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:45,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:45,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:45,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:45,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:45,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:45,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:45,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:45,249 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:46,195 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 00:04:46,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:46,195 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:46,195 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:04:46,195 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:04:46,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:46,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:04:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-01 00:04:46,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:04:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:04:46,847 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-01 00:04:46,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:46,848 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:04:46,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:46,848 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:04:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:46,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:46,848 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-01 00:04:46,848 INFO L423 AbstractCegarLoop]: === Iteration 504 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:46,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:46,848 INFO L82 PathProgramCache]: Analyzing trace with hash -463891902, now seen corresponding path program 488 times [2018-10-01 00:04:46,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:46,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:46,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:46,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:46,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:46,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:46,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:46,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:46,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:46,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:46,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:46,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:46,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:46,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:46,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:46,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:46,954 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-01 00:04:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:47,901 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 00:04:47,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:47,901 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:47,901 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:04:47,901 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:04:47,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:04:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2018-10-01 00:04:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:48,654 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:48,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:48,654 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:48,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:48,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:48,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:48,654 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:04:48,654 INFO L423 AbstractCegarLoop]: === Iteration 505 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:48,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:48,655 INFO L82 PathProgramCache]: Analyzing trace with hash -463889980, now seen corresponding path program 489 times [2018-10-01 00:04:48,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:48,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:48,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:48,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:48,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:48,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:48,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:48,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:04:48,740 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:04:48,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:48,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:48,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:48,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:48,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:48,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:48,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:48,765 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:49,676 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 00:04:49,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:49,676 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:49,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:49,676 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:04:49,676 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:04:49,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:04:50,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-01 00:04:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:04:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:04:50,452 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:04:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:50,452 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:04:50,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:04:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:50,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:50,453 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:04:50,453 INFO L423 AbstractCegarLoop]: === Iteration 506 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:50,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:50,453 INFO L82 PathProgramCache]: Analyzing trace with hash -462044860, now seen corresponding path program 490 times [2018-10-01 00:04:50,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:50,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:50,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:50,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:50,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:50,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:50,522 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:50,530 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:04:50,536 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:04:50,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:50,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:50,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:50,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:50,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:50,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:50,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:50,560 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:04:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:51,493 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 00:04:51,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:51,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:51,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:51,493 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:04:51,493 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:04:51,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:04:52,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2018-10-01 00:04:52,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:52,260 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:52,261 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:52,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:52,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:52,261 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 00:04:52,261 INFO L423 AbstractCegarLoop]: === Iteration 507 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:52,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:52,261 INFO L82 PathProgramCache]: Analyzing trace with hash -462042938, now seen corresponding path program 491 times [2018-10-01 00:04:52,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:52,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:52,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:52,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:52,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:52,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:52,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:52,344 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:04:52,354 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-01 00:04:52,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:52,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:52,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:52,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:52,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:52,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:52,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:52,379 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:53,294 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 00:04:53,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:53,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:53,294 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:04:53,294 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:04:53,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:04:53,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-10-01 00:04:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:04:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:04:53,939 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-01 00:04:53,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:53,939 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:04:53,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:04:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:53,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:53,940 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-01 00:04:53,940 INFO L423 AbstractCegarLoop]: === Iteration 508 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:53,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:53,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1311115460, now seen corresponding path program 492 times [2018-10-01 00:04:53,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:53,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:53,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:53,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:53,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:54,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:54,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:54,016 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:04:54,025 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-01 00:04:54,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:54,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:54,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:54,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:54,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:54,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:54,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:54,049 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-01 00:04:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:54,891 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 00:04:54,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:54,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:54,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:54,891 INFO L225 Difference]: With dead ends: 43 [2018-10-01 00:04:54,891 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 00:04:54,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 00:04:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2018-10-01 00:04:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:55,660 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:55,660 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:55,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:55,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:55,661 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 00:04:55,661 INFO L423 AbstractCegarLoop]: === Iteration 509 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:55,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:55,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1311117382, now seen corresponding path program 493 times [2018-10-01 00:04:55,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:55,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:55,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:55,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:55,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:55,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:55,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:55,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:55,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:55,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:55,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:55,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:55,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:55,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:55,763 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:56,621 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 00:04:56,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:56,621 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:56,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:56,621 INFO L225 Difference]: With dead ends: 43 [2018-10-01 00:04:56,622 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 00:04:56,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:56,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 00:04:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2018-10-01 00:04:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:04:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:04:57,393 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-01 00:04:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:57,393 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:04:57,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:04:57,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:57,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:57,393 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-01 00:04:57,393 INFO L423 AbstractCegarLoop]: === Iteration 510 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:57,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:57,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1312962502, now seen corresponding path program 494 times [2018-10-01 00:04:57,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:57,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:57,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:57,394 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:04:57,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:57,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:57,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:57,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:57,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:57,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:57,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:57,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:57,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:57,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:57,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:57,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:57,494 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-01 00:04:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:58,308 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-01 00:04:58,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:58,308 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:58,308 INFO L225 Difference]: With dead ends: 41 [2018-10-01 00:04:58,309 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 00:04:58,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 00:04:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2018-10-01 00:04:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:04:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:04:59,091 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-10-01 00:04:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:04:59,092 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:04:59,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:04:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:04:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-01 00:04:59,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:04:59,092 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-10-01 00:04:59,092 INFO L423 AbstractCegarLoop]: === Iteration 511 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:04:59,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:04:59,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1312964424, now seen corresponding path program 8 times [2018-10-01 00:04:59,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:04:59,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:04:59,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:59,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:04:59,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:04:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:04:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:59,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:04:59,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:04:59,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:04:59,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:04:59,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:04:59,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:04:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:04:59,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:04:59,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:04:59,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:04:59,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:04:59,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:59,203 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-10-01 00:04:59,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:04:59,988 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2018-10-01 00:04:59,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:04:59,989 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-01 00:04:59,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:04:59,989 INFO L225 Difference]: With dead ends: 40 [2018-10-01 00:04:59,989 INFO L226 Difference]: Without dead ends: 38 [2018-10-01 00:04:59,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-01 00:04:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-01 00:05:00,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 22. [2018-10-01 00:05:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-01 00:05:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-01 00:05:00,449 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-10-01 00:05:00,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:00,449 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-01 00:05:00,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:05:00,449 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-01 00:05:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:00,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:00,450 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1] [2018-10-01 00:05:00,450 INFO L423 AbstractCegarLoop]: === Iteration 512 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:00,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:00,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1024105275, now seen corresponding path program 9 times [2018-10-01 00:05:00,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:00,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:00,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:00,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:00,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:00,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:00,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:00,624 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:00,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:05:00,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:00,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:00,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:00,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:00,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:00,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:00,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:00,675 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 12 states. [2018-10-01 00:05:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:02,503 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 00:05:02,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:02,503 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:02,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:02,503 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:05:02,503 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:05:02,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:02,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:05:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 00:05:03,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:03,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:05:03,405 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:05:03,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:03,405 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:05:03,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:03,406 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:05:03,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:03,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:03,406 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 00:05:03,408 INFO L423 AbstractCegarLoop]: === Iteration 513 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:03,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:03,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1024107197, now seen corresponding path program 495 times [2018-10-01 00:05:03,408 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:03,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:03,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:03,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:03,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:03,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:03,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:03,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:03,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:05:03,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:03,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:03,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:03,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:03,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:03,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:03,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:03,547 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:05:05,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:05,273 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:05:05,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:05,273 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:05,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:05,273 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:05:05,273 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:05:05,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:05:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 00:05:06,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:05:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:05:06,169 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:05:06,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:06,169 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:05:06,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:05:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:06,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:06,170 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 00:05:06,170 INFO L423 AbstractCegarLoop]: === Iteration 514 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:06,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:06,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1025952317, now seen corresponding path program 496 times [2018-10-01 00:05:06,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:06,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:06,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:06,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:06,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:06,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:06,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:06,252 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:06,258 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:06,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:06,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:06,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:06,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:06,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:06,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:06,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:06,283 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:05:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:08,148 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 00:05:08,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:08,148 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:08,149 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:05:08,149 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:05:08,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:05:09,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 00:05:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:05:09,056 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:05:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:09,057 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:05:09,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:05:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:09,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:09,057 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:05:09,057 INFO L423 AbstractCegarLoop]: === Iteration 515 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:09,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:09,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1025954239, now seen corresponding path program 497 times [2018-10-01 00:05:09,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:09,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:09,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:09,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:09,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:09,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:09,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:09,141 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:09,150 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:05:09,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:09,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:09,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:09,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:09,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:09,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:09,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:09,174 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:05:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:10,946 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:05:10,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:10,946 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:10,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:10,946 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:05:10,946 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:05:10,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:05:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2018-10-01 00:05:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:05:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:05:11,800 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:05:11,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:11,800 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:05:11,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:05:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:11,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:11,800 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 00:05:11,801 INFO L423 AbstractCegarLoop]: === Iteration 516 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:11,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1495854659, now seen corresponding path program 498 times [2018-10-01 00:05:11,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:11,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:11,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:11,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:11,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:11,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:11,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:11,889 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:11,899 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:05:11,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:11,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:11,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:11,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:11,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:11,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:11,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:11,923 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:05:13,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:13,661 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:05:13,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:13,661 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:13,661 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:05:13,661 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:05:13,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:05:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2018-10-01 00:05:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:14,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:05:14,616 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:05:14,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:14,616 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:05:14,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:05:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:14,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:14,617 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:05:14,617 INFO L423 AbstractCegarLoop]: === Iteration 517 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:14,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:14,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1495852737, now seen corresponding path program 499 times [2018-10-01 00:05:14,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:14,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:14,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:14,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:14,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:14,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:14,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:14,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:14,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:14,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:14,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:14,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:14,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:14,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:14,727 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:05:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:16,407 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:05:16,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:16,407 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:16,408 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:05:16,408 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:05:16,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:05:17,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2018-10-01 00:05:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:05:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:05:17,316 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:05:17,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:17,316 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:05:17,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:17,316 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:05:17,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:17,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:17,317 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:05:17,317 INFO L423 AbstractCegarLoop]: === Iteration 518 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:17,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:17,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1494007617, now seen corresponding path program 500 times [2018-10-01 00:05:17,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:17,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:17,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:17,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:17,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:17,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:17,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:17,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:17,432 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:17,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:17,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:17,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:17,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:17,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:17,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:17,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:17,457 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:05:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:19,171 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:05:19,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:19,171 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:19,172 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:05:19,172 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:05:19,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:19,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:05:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 00:05:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:20,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:05:20,050 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:05:20,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:20,050 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:05:20,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:20,050 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:05:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:20,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:20,050 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:05:20,050 INFO L423 AbstractCegarLoop]: === Iteration 519 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:20,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:20,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1494005695, now seen corresponding path program 501 times [2018-10-01 00:05:20,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:20,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:20,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:20,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:20,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:20,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:20,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:20,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:20,145 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:05:20,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:20,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:20,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:20,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:20,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:20,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:20,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:20,170 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:05:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:21,803 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:05:21,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:21,803 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:21,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:21,803 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:05:21,803 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:05:21,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:05:22,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 32. [2018-10-01 00:05:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:05:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:05:22,569 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 00:05:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:22,569 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:05:22,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:22,569 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:05:22,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:22,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:22,570 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 00:05:22,570 INFO L423 AbstractCegarLoop]: === Iteration 520 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:22,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:22,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1704163645, now seen corresponding path program 502 times [2018-10-01 00:05:22,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:22,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:22,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:22,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:22,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:22,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:22,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:22,656 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:22,662 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:22,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:22,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:22,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:22,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:22,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:22,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:22,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:22,687 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 00:05:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:24,499 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 00:05:24,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:24,499 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:24,500 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:05:24,500 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:05:24,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:05:25,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 00:05:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:05:25,337 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:05:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:25,337 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:05:25,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:05:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:25,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:25,338 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:05:25,338 INFO L423 AbstractCegarLoop]: === Iteration 521 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:25,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:25,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1704165567, now seen corresponding path program 503 times [2018-10-01 00:05:25,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:25,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:25,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:25,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:25,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:25,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:25,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:25,604 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:25,615 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:05:25,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:25,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:25,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:25,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:25,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:25,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:25,640 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:05:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:27,457 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:05:27,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:27,457 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:27,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:27,457 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:05:27,458 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:05:27,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:27,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:05:28,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 00:05:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:05:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:05:28,379 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:05:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:28,379 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:05:28,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:28,379 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:05:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:28,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:28,379 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:05:28,380 INFO L423 AbstractCegarLoop]: === Iteration 522 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:28,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:28,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1706010687, now seen corresponding path program 504 times [2018-10-01 00:05:28,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:28,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:28,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:28,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:28,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:28,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:28,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:28,464 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:28,475 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:05:28,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:28,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:28,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:28,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:28,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:28,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:28,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:28,499 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:05:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:30,368 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 00:05:30,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:30,368 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:30,369 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:05:30,369 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:05:30,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:30,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:05:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 00:05:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:05:31,230 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:05:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:31,230 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:05:31,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:05:31,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:31,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:31,231 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:05:31,231 INFO L423 AbstractCegarLoop]: === Iteration 523 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:31,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:31,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1706012609, now seen corresponding path program 505 times [2018-10-01 00:05:31,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:31,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:31,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:31,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:31,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:31,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:31,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:31,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:31,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:31,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:31,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:31,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:31,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:31,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:31,344 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:05:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:33,107 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:05:33,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:33,107 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:33,108 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:05:33,108 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:05:33,108 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:33,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:05:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2018-10-01 00:05:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:05:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:05:33,978 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:05:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:33,978 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:05:33,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:05:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:33,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:33,978 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:05:33,979 INFO L423 AbstractCegarLoop]: === Iteration 524 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:33,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:33,979 INFO L82 PathProgramCache]: Analyzing trace with hash -815796289, now seen corresponding path program 506 times [2018-10-01 00:05:33,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:33,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:33,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:33,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:34,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:34,062 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:34,069 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:34,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:34,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:34,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:34,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:34,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:34,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:34,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:34,094 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:05:35,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:35,844 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:05:35,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:35,844 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:35,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:35,844 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:05:35,844 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:05:35,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:05:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2018-10-01 00:05:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:05:36,767 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:05:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:36,767 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:05:36,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:05:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:36,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:36,767 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:05:36,768 INFO L423 AbstractCegarLoop]: === Iteration 525 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:36,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:36,768 INFO L82 PathProgramCache]: Analyzing trace with hash -815794367, now seen corresponding path program 507 times [2018-10-01 00:05:36,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:36,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:36,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:36,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:36,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:36,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:36,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:36,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:36,867 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:05:36,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:36,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:36,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:36,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:36,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:36,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:36,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:36,892 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:05:38,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:38,667 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:05:38,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:38,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:38,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:38,668 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:05:38,668 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:05:38,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:05:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2018-10-01 00:05:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:05:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:05:39,561 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:05:39,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:39,561 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:05:39,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:39,561 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:05:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:39,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:39,562 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:05:39,562 INFO L423 AbstractCegarLoop]: === Iteration 526 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:39,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash -813949247, now seen corresponding path program 508 times [2018-10-01 00:05:39,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:39,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:39,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:39,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:39,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:39,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:39,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:39,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:39,651 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:39,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:39,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:39,674 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:39,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:39,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:39,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:39,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:39,675 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:05:41,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:41,405 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:05:41,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:41,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:41,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:41,405 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:05:41,405 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:05:41,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:05:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 00:05:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:42,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:05:42,289 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:05:42,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:42,289 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:05:42,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:42,289 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:05:42,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:42,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:42,289 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:05:42,289 INFO L423 AbstractCegarLoop]: === Iteration 527 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:42,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:42,290 INFO L82 PathProgramCache]: Analyzing trace with hash -813947325, now seen corresponding path program 509 times [2018-10-01 00:05:42,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:42,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:42,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:42,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:42,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:42,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:42,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:42,373 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:42,387 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:05:42,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:42,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:42,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:42,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:42,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:42,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:42,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:42,410 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:05:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:44,105 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:05:44,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:44,105 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:44,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:44,105 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:05:44,105 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:05:44,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:05:44,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 30. [2018-10-01 00:05:44,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:05:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:05:44,849 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 21 [2018-10-01 00:05:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:44,850 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:05:44,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:44,850 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:05:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:44,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:44,850 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 00:05:44,850 INFO L423 AbstractCegarLoop]: === Iteration 528 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:44,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:44,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1725169853, now seen corresponding path program 510 times [2018-10-01 00:05:44,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:44,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:44,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:44,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:44,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:44,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:44,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:44,931 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:05:44,942 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:05:44,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:44,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:44,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:44,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:44,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:44,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:44,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:44,966 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 12 states. [2018-10-01 00:05:46,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:46,617 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:05:46,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:46,617 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:46,618 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:05:46,618 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:05:46,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:46,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:05:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 00:05:47,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:05:47,505 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:05:47,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:47,505 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:05:47,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:05:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:47,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:47,505 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:05:47,505 INFO L423 AbstractCegarLoop]: === Iteration 529 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:47,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:47,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1725171775, now seen corresponding path program 511 times [2018-10-01 00:05:47,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:47,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:47,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:47,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:47,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:47,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:47,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:47,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:47,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:47,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:47,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:47,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:47,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:47,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:47,620 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:05:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:49,296 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:05:49,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:49,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:49,297 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:05:49,297 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:05:49,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:05:50,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 00:05:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:05:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:05:50,143 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:05:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:50,143 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:05:50,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:05:50,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:50,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:50,143 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:05:50,143 INFO L423 AbstractCegarLoop]: === Iteration 530 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:50,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1727016895, now seen corresponding path program 512 times [2018-10-01 00:05:50,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:50,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:50,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:50,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:05:50,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:50,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:50,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:50,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:05:50,245 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:05:50,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:50,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:50,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:50,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:50,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:50,270 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:05:51,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:51,897 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:05:51,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:51,897 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:51,898 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:05:51,898 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:05:51,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:05:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 00:05:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:05:52,767 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:05:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:52,767 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:05:52,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:52,767 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:05:52,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:52,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:52,768 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:05:52,768 INFO L423 AbstractCegarLoop]: === Iteration 531 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:52,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:52,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1727018817, now seen corresponding path program 513 times [2018-10-01 00:05:52,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:52,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:52,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:52,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:52,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:52,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:52,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:52,849 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:05:52,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:05:52,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:52,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:52,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:52,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:52,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:52,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:52,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:52,887 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:05:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:54,504 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:05:54,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:54,504 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:54,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:54,505 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:05:54,505 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:05:54,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:54,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:05:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2018-10-01 00:05:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:05:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:05:55,378 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:05:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:55,379 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:05:55,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:05:55,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:55,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:55,379 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:05:55,379 INFO L423 AbstractCegarLoop]: === Iteration 532 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:55,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:55,379 INFO L82 PathProgramCache]: Analyzing trace with hash -794790081, now seen corresponding path program 514 times [2018-10-01 00:05:55,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:55,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:55,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:55,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:55,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:55,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:55,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:55,465 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:05:55,473 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:05:55,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:55,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:55,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:55,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:55,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:55,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:55,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:55,500 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:05:57,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:57,189 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:05:57,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:57,189 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:57,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:57,189 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:05:57,189 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:05:57,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:05:58,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 00:05:58,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:05:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:05:58,098 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:05:58,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:05:58,099 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:05:58,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:05:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:05:58,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:05:58,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:05:58,099 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:05:58,099 INFO L423 AbstractCegarLoop]: === Iteration 533 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:05:58,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:05:58,099 INFO L82 PathProgramCache]: Analyzing trace with hash -794788159, now seen corresponding path program 515 times [2018-10-01 00:05:58,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:05:58,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:05:58,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:58,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:05:58,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:05:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:05:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:58,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:05:58,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:05:58,188 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:05:58,198 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:05:58,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:05:58,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:05:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:05:58,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:05:58,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:05:58,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:05:58,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:05:58,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:58,223 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:05:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:05:59,923 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:05:59,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:05:59,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:05:59,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:05:59,924 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:05:59,924 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:05:59,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:05:59,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:06:00,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 00:06:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:06:00,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:06:00,852 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:06:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:00,852 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:06:00,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:00,852 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:06:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:00,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:00,852 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:06:00,853 INFO L423 AbstractCegarLoop]: === Iteration 534 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:00,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:00,853 INFO L82 PathProgramCache]: Analyzing trace with hash -792943039, now seen corresponding path program 516 times [2018-10-01 00:06:00,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:00,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:00,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:00,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:00,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:00,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:00,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:00,934 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:00,945 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:06:00,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:00,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:00,972 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:00,972 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:00,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:00,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:00,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:00,973 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:06:02,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:02,610 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:06:02,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:02,610 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:02,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:02,611 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:06:02,611 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:06:02,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:02,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:06:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 00:06:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:06:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:06:03,509 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:06:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:03,509 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:06:03,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:06:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:03,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:03,509 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:06:03,509 INFO L423 AbstractCegarLoop]: === Iteration 535 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:03,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:03,509 INFO L82 PathProgramCache]: Analyzing trace with hash -792941117, now seen corresponding path program 517 times [2018-10-01 00:06:03,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:03,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:03,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:03,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:03,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:03,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:03,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:03,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:03,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:03,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:03,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:03,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:03,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:03,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:03,624 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:06:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:05,198 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:06:05,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:05,198 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:05,198 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:06:05,198 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:06:05,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:06:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 32. [2018-10-01 00:06:05,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:06:05,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:06:05,993 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 00:06:05,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:05,993 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:06:05,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:06:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:05,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:05,993 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:06:05,993 INFO L423 AbstractCegarLoop]: === Iteration 536 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:05,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:05,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1889739073, now seen corresponding path program 518 times [2018-10-01 00:06:05,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:05,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:05,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:05,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:05,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:06,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:06,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:06,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:06,705 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:06,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:06,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:06,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:06,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:06,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:06,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:06,729 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 00:06:08,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:08,260 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:06:08,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:08,260 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:08,260 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:06:08,260 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:06:08,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:06:09,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 00:06:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:06:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:06:09,185 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:06:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:09,185 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:06:09,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:06:09,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:09,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:09,185 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:06:09,185 INFO L423 AbstractCegarLoop]: === Iteration 537 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:09,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:09,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1889737151, now seen corresponding path program 519 times [2018-10-01 00:06:09,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:09,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:09,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:09,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:09,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:09,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:09,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:09,286 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:09,299 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:06:09,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:09,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:09,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:09,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:09,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:09,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:09,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:09,332 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:06:10,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:10,842 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:06:10,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:10,842 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:10,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:10,843 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:06:10,843 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:06:10,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:06:11,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 00:06:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:06:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:06:11,774 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:06:11,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:11,775 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:06:11,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:06:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:11,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:11,775 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:06:11,775 INFO L423 AbstractCegarLoop]: === Iteration 538 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:11,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:11,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1887892031, now seen corresponding path program 520 times [2018-10-01 00:06:11,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:11,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:11,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:11,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:11,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:11,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:11,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:11,901 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:11,909 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:11,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:11,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:11,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:11,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:11,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:11,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:11,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:11,932 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:06:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:13,501 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:06:13,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:13,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:13,502 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:06:13,502 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:06:13,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:06:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 00:06:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:06:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:06:14,372 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:06:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:14,372 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:06:14,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:14,373 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:06:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:14,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:14,373 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:06:14,373 INFO L423 AbstractCegarLoop]: === Iteration 539 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:14,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1887890109, now seen corresponding path program 521 times [2018-10-01 00:06:14,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:14,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:14,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:14,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:14,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:14,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:14,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:14,460 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:14,474 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:06:14,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:14,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:14,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:14,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:14,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:14,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:14,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:14,498 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:06:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:16,021 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:06:16,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:16,021 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:16,022 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:06:16,022 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:06:16,022 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:16,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:06:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 00:06:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:06:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:06:16,891 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:06:16,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:16,892 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:06:16,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:06:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:16,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:16,892 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:06:16,892 INFO L423 AbstractCegarLoop]: === Iteration 540 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:16,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:16,892 INFO L82 PathProgramCache]: Analyzing trace with hash -114731711, now seen corresponding path program 522 times [2018-10-01 00:06:16,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:16,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:16,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:16,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:16,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:17,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:17,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:17,053 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:17,064 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:06:17,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:17,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:17,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:17,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:17,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:17,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:17,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:17,099 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:06:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:18,570 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:06:18,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:18,570 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:18,571 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:06:18,571 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:06:18,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:06:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2018-10-01 00:06:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:06:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:06:19,524 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:06:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:19,524 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:06:19,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:06:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:19,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:19,524 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:06:19,525 INFO L423 AbstractCegarLoop]: === Iteration 541 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:19,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:19,525 INFO L82 PathProgramCache]: Analyzing trace with hash -114729789, now seen corresponding path program 523 times [2018-10-01 00:06:19,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:19,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:19,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:19,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:19,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:19,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:19,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:19,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:19,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:19,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:19,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:19,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:19,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:19,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:19,643 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:06:21,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:21,097 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:06:21,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:21,097 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:21,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:21,098 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:06:21,098 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:06:21,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:06:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 00:06:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:06:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:06:22,010 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:06:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:22,010 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:06:22,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:22,010 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:06:22,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:22,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:22,011 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:06:22,011 INFO L423 AbstractCegarLoop]: === Iteration 542 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:22,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:22,011 INFO L82 PathProgramCache]: Analyzing trace with hash -112884669, now seen corresponding path program 524 times [2018-10-01 00:06:22,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:22,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:22,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:22,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:22,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:22,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:22,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:22,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:22,145 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:22,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:22,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:22,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:22,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:22,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:22,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:22,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:22,169 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:06:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:23,605 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:06:23,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:23,605 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:23,606 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:06:23,606 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:06:23,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:06:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-10-01 00:06:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:06:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:06:24,536 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:06:24,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:24,536 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:06:24,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:24,536 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:06:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:24,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:24,537 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:06:24,537 INFO L423 AbstractCegarLoop]: === Iteration 543 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:24,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:24,537 INFO L82 PathProgramCache]: Analyzing trace with hash -112882747, now seen corresponding path program 525 times [2018-10-01 00:06:24,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:24,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:24,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:24,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:24,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:24,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:24,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:24,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:24,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:06:24,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:24,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:24,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:24,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:24,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:24,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:24,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:24,685 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:06:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:26,046 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:06:26,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:26,046 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:26,046 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:06:26,046 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:06:26,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:06:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-10-01 00:06:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:06:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 00:06:26,701 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 21 [2018-10-01 00:06:26,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:26,701 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 00:06:26,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 00:06:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:26,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:26,701 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 00:06:26,701 INFO L423 AbstractCegarLoop]: === Iteration 544 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:26,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:26,701 INFO L82 PathProgramCache]: Analyzing trace with hash 437299261, now seen corresponding path program 526 times [2018-10-01 00:06:26,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:26,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:26,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:26,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:26,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:26,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:26,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:26,786 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:26,792 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:26,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:26,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:26,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:26,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:26,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:26,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:26,817 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 12 states. [2018-10-01 00:06:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:28,766 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 00:06:28,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:28,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:28,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:28,766 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:06:28,766 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:06:28,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:06:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 00:06:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:06:29,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:06:29,649 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:06:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:29,649 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:06:29,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:06:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:29,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:29,650 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:06:29,650 INFO L423 AbstractCegarLoop]: === Iteration 545 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:29,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:29,650 INFO L82 PathProgramCache]: Analyzing trace with hash 437301183, now seen corresponding path program 527 times [2018-10-01 00:06:29,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:29,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:29,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:29,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:29,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:29,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:29,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:29,736 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:29,745 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:06:29,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:29,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:29,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:29,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:29,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:29,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:29,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:29,769 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:06:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:31,640 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:06:31,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:31,640 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:31,641 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:06:31,641 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:06:31,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:06:32,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 00:06:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:06:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:06:32,512 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:06:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:32,512 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:06:32,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:32,512 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:06:32,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:32,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:32,512 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:06:32,512 INFO L423 AbstractCegarLoop]: === Iteration 546 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:32,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash 439146303, now seen corresponding path program 528 times [2018-10-01 00:06:32,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:32,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:32,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:32,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:32,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:32,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:32,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:32,594 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:32,605 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:06:32,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:32,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:32,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:32,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:32,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:32,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:32,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:32,629 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:06:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:34,571 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 00:06:34,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:34,571 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:34,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:34,572 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:06:34,572 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:06:34,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:34,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:06:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 00:06:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:06:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:06:35,574 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:06:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:35,574 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:06:35,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:06:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:35,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:35,574 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:06:35,574 INFO L423 AbstractCegarLoop]: === Iteration 547 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:35,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:35,574 INFO L82 PathProgramCache]: Analyzing trace with hash 439148225, now seen corresponding path program 529 times [2018-10-01 00:06:35,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:35,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:35,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:35,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:35,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:35,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:35,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:35,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:35,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:35,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:35,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:35,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:35,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:35,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:35,690 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:06:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:37,581 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:06:37,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:37,581 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:37,582 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:06:37,582 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:06:37,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:06:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2018-10-01 00:06:38,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:06:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:06:38,507 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:06:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:38,508 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:06:38,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:38,508 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:06:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:38,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:38,508 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:06:38,508 INFO L423 AbstractCegarLoop]: === Iteration 548 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:38,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:38,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2082660673, now seen corresponding path program 530 times [2018-10-01 00:06:38,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:38,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:38,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:38,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:38,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:38,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:38,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:38,597 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:38,604 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:38,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:38,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:38,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:38,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:38,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:38,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:38,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:38,629 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:06:40,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:40,496 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:06:40,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:40,496 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:40,496 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:06:40,496 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:06:40,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:06:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2018-10-01 00:06:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:06:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:06:41,439 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:06:41,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:41,439 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:06:41,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:06:41,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:41,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:41,439 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:06:41,439 INFO L423 AbstractCegarLoop]: === Iteration 549 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:41,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:41,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2082658751, now seen corresponding path program 531 times [2018-10-01 00:06:41,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:41,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:41,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:41,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:41,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:41,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:41,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:41,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:41,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:06:41,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:41,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:41,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:41,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:41,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:41,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:41,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:41,559 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:06:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:43,427 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:06:43,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:43,427 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:43,427 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:06:43,427 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:06:43,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:06:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2018-10-01 00:06:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:06:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:06:44,401 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:06:44,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:44,401 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:06:44,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:44,402 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:06:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:44,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:44,402 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:06:44,402 INFO L423 AbstractCegarLoop]: === Iteration 550 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:44,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:44,402 INFO L82 PathProgramCache]: Analyzing trace with hash -2080813631, now seen corresponding path program 532 times [2018-10-01 00:06:44,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:44,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:44,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:44,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:44,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:44,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:44,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:44,649 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:06:44,654 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:06:44,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:44,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:44,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:44,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:44,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:44,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:44,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:44,678 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:06:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:46,434 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:06:46,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:46,434 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:46,434 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:06:46,435 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:06:46,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:46,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:06:47,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 00:06:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:06:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:06:47,374 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:06:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:47,374 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:06:47,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:06:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:47,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:47,375 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:06:47,375 INFO L423 AbstractCegarLoop]: === Iteration 551 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:47,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:47,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2080811709, now seen corresponding path program 533 times [2018-10-01 00:06:47,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:47,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:47,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:47,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:47,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:47,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:47,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:47,458 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:06:47,469 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:06:47,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:47,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:47,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:47,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:47,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:47,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:47,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:47,494 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:06:49,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:49,228 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:06:49,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:49,228 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:49,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:49,229 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:06:49,229 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:06:49,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:06:50,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 32. [2018-10-01 00:06:50,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:06:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:06:50,076 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 00:06:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:50,076 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:06:50,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:06:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:50,077 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:50,077 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:06:50,077 INFO L423 AbstractCegarLoop]: === Iteration 552 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:50,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:50,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1117357631, now seen corresponding path program 534 times [2018-10-01 00:06:50,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:50,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:50,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:50,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:50,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:50,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:50,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:50,168 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:06:50,179 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:06:50,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:50,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:50,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:50,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:50,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:50,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:50,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:50,203 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 00:06:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:52,204 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 00:06:52,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:52,204 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:52,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:52,204 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:06:52,204 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:06:52,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:52,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:06:53,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 00:06:53,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:06:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:06:53,097 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:06:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:53,097 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:06:53,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:06:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:53,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:53,097 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:06:53,097 INFO L423 AbstractCegarLoop]: === Iteration 553 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:53,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1117359553, now seen corresponding path program 535 times [2018-10-01 00:06:53,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:53,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:53,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:53,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:53,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:53,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:53,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:53,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:53,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:53,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:53,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:53,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:53,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:53,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:53,213 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:06:55,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:55,165 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:06:55,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:55,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:55,166 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:06:55,166 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:06:55,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:55,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:06:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-10-01 00:06:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:06:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:06:56,156 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:06:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:56,156 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:06:56,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:06:56,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:56,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:56,156 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:06:56,157 INFO L423 AbstractCegarLoop]: === Iteration 554 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:56,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:56,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1119204673, now seen corresponding path program 536 times [2018-10-01 00:06:56,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:56,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:56,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:56,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:06:56,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:56,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:56,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:56,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:06:56,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:06:56,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:56,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:56,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:56,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:56,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:56,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:56,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:56,270 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:06:58,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:06:58,301 INFO L93 Difference]: Finished difference Result 73 states and 106 transitions. [2018-10-01 00:06:58,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:06:58,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:06:58,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:06:58,301 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:06:58,302 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:06:58,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:06:59,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 38. [2018-10-01 00:06:59,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:06:59,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:06:59,212 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:06:59,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:06:59,212 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:06:59,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:06:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:06:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:06:59,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:06:59,212 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:06:59,212 INFO L423 AbstractCegarLoop]: === Iteration 555 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:06:59,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:06:59,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1119206595, now seen corresponding path program 537 times [2018-10-01 00:06:59,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:06:59,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:06:59,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:59,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:06:59,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:06:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:06:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:59,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:06:59,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:06:59,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:06:59,307 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:06:59,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:06:59,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:06:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:06:59,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:06:59,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:06:59,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:06:59,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:06:59,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:06:59,332 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:07:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:01,270 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-10-01 00:07:01,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:01,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:01,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:01,270 INFO L225 Difference]: With dead ends: 71 [2018-10-01 00:07:01,270 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:07:01,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:07:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2018-10-01 00:07:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:07:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:07:02,160 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:07:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:02,160 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:07:02,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:07:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:02,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:02,160 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:07:02,160 INFO L423 AbstractCegarLoop]: === Iteration 556 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:02,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:02,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1402602303, now seen corresponding path program 538 times [2018-10-01 00:07:02,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:02,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:02,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:02,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:02,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:02,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:02,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:02,244 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:02,251 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:02,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:02,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:02,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:02,274 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:02,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:02,274 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:07:04,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:04,138 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:07:04,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:04,138 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:04,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:04,138 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:07:04,138 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:07:04,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:07:05,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 38. [2018-10-01 00:07:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:05,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:07:05,060 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:07:05,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:05,061 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:07:05,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:07:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:05,061 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:05,061 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:05,061 INFO L423 AbstractCegarLoop]: === Iteration 557 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:05,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:05,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1402600381, now seen corresponding path program 539 times [2018-10-01 00:07:05,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:05,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:05,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:05,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:05,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:05,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:05,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:05,149 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:05,162 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:07:05,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:05,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:05,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:05,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:05,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:05,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:05,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:05,186 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:07:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:07,028 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2018-10-01 00:07:07,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:07,028 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:07,029 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:07:07,029 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:07:07,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:07,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:07:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2018-10-01 00:07:07,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:07:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:07:07,967 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:07:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:07,967 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:07:07,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:07,967 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:07:07,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:07,967 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:07,967 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:07,967 INFO L423 AbstractCegarLoop]: === Iteration 558 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:07,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:07,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1400755261, now seen corresponding path program 540 times [2018-10-01 00:07:07,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:07,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:07,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:07,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:07,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:08,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:08,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:08,154 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:08,164 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:07:08,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:08,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:08,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:08,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:08,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:08,189 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:07:09,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:09,964 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:07:09,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:09,964 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:09,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:09,965 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:07:09,965 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:07:09,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:07:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 00:07:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:07:10,860 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:07:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:10,861 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:07:10,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:07:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:10,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:10,861 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:10,861 INFO L423 AbstractCegarLoop]: === Iteration 559 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:10,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1400753339, now seen corresponding path program 541 times [2018-10-01 00:07:10,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:10,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:10,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:10,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:10,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:10,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:10,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:10,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:10,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:11,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:11,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:11,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:11,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:11,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:11,006 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:07:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:12,697 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:07:12,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:12,697 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:12,697 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:07:12,697 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:07:12,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:12,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:07:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 30. [2018-10-01 00:07:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:07:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:07:13,460 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 21 [2018-10-01 00:07:13,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:13,460 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:07:13,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:13,460 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:07:13,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:13,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:13,460 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:07:13,460 INFO L423 AbstractCegarLoop]: === Iteration 560 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:13,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:13,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1138363839, now seen corresponding path program 542 times [2018-10-01 00:07:13,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:13,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:13,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:13,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:13,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:13,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:13,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:13,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:13,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:13,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:13,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:13,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:13,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:13,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:13,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:13,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:13,575 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 12 states. [2018-10-01 00:07:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:15,356 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:07:15,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:15,356 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:15,356 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:07:15,356 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:07:15,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:07:16,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 00:07:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:07:16,353 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:07:16,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:16,353 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:07:16,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:16,353 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:07:16,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:16,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:16,353 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:07:16,353 INFO L423 AbstractCegarLoop]: === Iteration 561 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:16,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:16,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1138365761, now seen corresponding path program 543 times [2018-10-01 00:07:16,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:16,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:16,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:16,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:16,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:16,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:16,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:16,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:16,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:07:16,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:16,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:16,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:16,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:16,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:16,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:16,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:16,468 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:07:18,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:18,226 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:07:18,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:18,226 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:18,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:18,226 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:07:18,226 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:07:18,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:07:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 00:07:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:07:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:07:19,119 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:07:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:19,120 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:07:19,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:07:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:19,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:19,120 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:07:19,120 INFO L423 AbstractCegarLoop]: === Iteration 562 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:19,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:19,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1140210881, now seen corresponding path program 544 times [2018-10-01 00:07:19,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:19,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:19,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:19,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:19,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:19,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:19,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:19,213 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:19,219 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:19,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:19,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:19,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:19,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:19,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:19,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:19,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:19,243 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:07:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:20,980 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:07:20,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:20,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:20,981 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:07:20,981 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:07:20,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:20,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:07:21,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 00:07:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:21,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:07:21,901 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:07:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:21,901 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:07:21,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:21,901 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:07:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:21,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:21,901 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:21,902 INFO L423 AbstractCegarLoop]: === Iteration 563 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:21,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:21,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1140212803, now seen corresponding path program 545 times [2018-10-01 00:07:21,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:21,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:21,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:21,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:21,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:21,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:21,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:21,983 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:21,997 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:07:21,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:21,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:22,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:22,021 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:22,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:22,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:22,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:22,021 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:07:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:23,686 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:07:23,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:23,686 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:23,686 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:07:23,686 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:07:23,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:07:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2018-10-01 00:07:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:07:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:07:24,581 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:07:24,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:24,581 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:07:24,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:24,581 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:07:24,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:24,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:24,582 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:07:24,582 INFO L423 AbstractCegarLoop]: === Iteration 564 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:24,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:24,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1381596095, now seen corresponding path program 546 times [2018-10-01 00:07:24,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:24,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:24,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:24,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:24,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:24,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:24,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:24,674 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:24,683 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:07:24,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:24,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:24,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:24,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:24,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:24,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:24,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:24,707 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:07:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:26,493 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:07:26,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:26,493 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:26,493 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:07:26,494 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:07:26,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:07:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2018-10-01 00:07:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:07:27,414 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:07:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:27,414 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:07:27,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:07:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:27,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:27,414 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:27,414 INFO L423 AbstractCegarLoop]: === Iteration 565 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:27,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1381594173, now seen corresponding path program 547 times [2018-10-01 00:07:27,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:27,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:27,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:27,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:27,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:27,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:27,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:27,519 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:27,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:27,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:27,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:27,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:27,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:27,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:27,550 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:07:29,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:29,377 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2018-10-01 00:07:29,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:29,377 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:29,377 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:07:29,377 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:07:29,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:29,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:07:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2018-10-01 00:07:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:07:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:07:30,362 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:07:30,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:30,363 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:07:30,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:30,363 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:07:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:30,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:30,363 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:30,363 INFO L423 AbstractCegarLoop]: === Iteration 566 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:30,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1379749053, now seen corresponding path program 548 times [2018-10-01 00:07:30,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:30,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:30,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:30,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:30,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:30,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:30,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:30,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:30,452 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:30,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:30,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:30,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:30,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:30,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:30,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:30,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:30,477 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:07:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:32,234 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:07:32,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:32,234 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:32,234 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:07:32,234 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:07:32,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:07:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 00:07:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:07:33,143 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:07:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:33,143 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:07:33,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:07:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:33,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:33,143 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:33,143 INFO L423 AbstractCegarLoop]: === Iteration 567 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:33,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:33,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1379747131, now seen corresponding path program 549 times [2018-10-01 00:07:33,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:33,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:33,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:33,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:33,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:33,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:33,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:33,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:33,236 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:07:33,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:33,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:33,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:33,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:33,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:33,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:33,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:33,260 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:07:34,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:34,959 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:07:34,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:34,959 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:34,960 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:07:34,960 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:07:34,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:07:35,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 32. [2018-10-01 00:07:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:07:35,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:07:35,835 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 00:07:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:35,835 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:07:35,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:35,835 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:07:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:35,835 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:35,835 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:07:35,835 INFO L423 AbstractCegarLoop]: === Iteration 568 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:35,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:35,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1818422209, now seen corresponding path program 550 times [2018-10-01 00:07:35,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:35,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:35,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:35,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:35,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:35,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:35,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:35,922 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:35,930 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:35,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:35,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:35,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:35,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:35,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:35,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:35,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:35,953 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 00:07:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:37,636 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:07:37,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:37,636 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:37,637 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:07:37,637 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:07:37,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:07:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 00:07:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:07:38,644 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:07:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:38,644 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:07:38,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:07:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:38,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:38,644 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:38,644 INFO L423 AbstractCegarLoop]: === Iteration 569 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:38,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:38,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1818424131, now seen corresponding path program 551 times [2018-10-01 00:07:38,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:38,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:38,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:38,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:38,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:38,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:38,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:38,762 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:38,774 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:07:38,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:38,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:38,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:38,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:38,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:38,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:38,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:38,798 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:07:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:40,388 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:07:40,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:40,388 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:40,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:40,388 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:07:40,388 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:07:40,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:07:41,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 36. [2018-10-01 00:07:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:07:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:07:41,337 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:07:41,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:41,337 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:07:41,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:07:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:41,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:41,337 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:41,337 INFO L423 AbstractCegarLoop]: === Iteration 570 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:41,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:41,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1820269251, now seen corresponding path program 552 times [2018-10-01 00:07:41,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:41,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:41,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:41,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:41,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:41,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:41,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:41,417 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:41,428 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:07:41,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:41,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:41,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:41,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:41,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:41,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:41,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:41,453 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:07:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:43,077 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:07:43,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:43,077 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:43,078 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:07:43,078 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:07:43,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:07:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 00:07:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:07:44,016 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:07:44,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:44,016 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:07:44,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:07:44,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:44,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:44,017 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:44,017 INFO L423 AbstractCegarLoop]: === Iteration 571 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:44,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:44,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1820271173, now seen corresponding path program 553 times [2018-10-01 00:07:44,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:44,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:44,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:44,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:44,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:44,103 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:44,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:44,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:44,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:44,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:44,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:44,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:44,140 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:07:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:45,763 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:07:45,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:45,763 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:45,763 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:07:45,763 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:07:45,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:07:46,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 00:07:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:07:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:07:46,624 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:07:46,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:46,624 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:07:46,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:46,624 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:07:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:46,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:46,624 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:46,624 INFO L423 AbstractCegarLoop]: === Iteration 572 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:46,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:46,624 INFO L82 PathProgramCache]: Analyzing trace with hash -701537725, now seen corresponding path program 554 times [2018-10-01 00:07:46,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:46,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:46,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:46,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:46,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:46,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:46,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:46,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:07:46,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:07:46,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:46,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:46,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:46,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:46,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:46,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:46,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:46,740 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:07:48,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:48,270 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:07:48,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:48,270 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:48,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:48,270 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:07:48,270 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:07:48,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:07:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2018-10-01 00:07:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:07:49,267 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:07:49,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:49,267 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:07:49,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:07:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:49,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:49,267 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:49,267 INFO L423 AbstractCegarLoop]: === Iteration 573 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:49,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:49,267 INFO L82 PathProgramCache]: Analyzing trace with hash -701535803, now seen corresponding path program 555 times [2018-10-01 00:07:49,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:49,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:49,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:49,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:49,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:49,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:49,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:49,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:07:49,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:07:49,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:49,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:49,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:49,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:49,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:49,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:49,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:49,397 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:07:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:50,950 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:07:50,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:50,950 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:50,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:50,950 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:07:50,950 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:07:50,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:50,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:07:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 00:07:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:07:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:07:51,894 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:07:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:51,894 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:07:51,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:07:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:51,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:51,894 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:07:51,894 INFO L423 AbstractCegarLoop]: === Iteration 574 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:51,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:51,895 INFO L82 PathProgramCache]: Analyzing trace with hash -699690683, now seen corresponding path program 556 times [2018-10-01 00:07:51,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:51,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:51,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:51,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:51,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:51,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:51,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:51,976 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:07:51,982 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:07:51,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:51,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:52,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:52,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:52,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:52,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:52,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:52,006 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:07:53,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:53,442 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:07:53,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:53,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:53,443 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:07:53,443 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:07:53,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:07:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-10-01 00:07:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:07:54,353 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:07:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:54,353 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:07:54,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:07:54,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:54,354 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:54,354 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:07:54,354 INFO L423 AbstractCegarLoop]: === Iteration 575 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:54,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:54,354 INFO L82 PathProgramCache]: Analyzing trace with hash -699688761, now seen corresponding path program 557 times [2018-10-01 00:07:54,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:54,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:54,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:54,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:54,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:54,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:54,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:54,438 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:07:54,450 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:07:54,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:54,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:54,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:54,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:54,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:54,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:54,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:54,474 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:07:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:55,903 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:07:55,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:55,903 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:55,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:55,904 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:07:55,904 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:07:55,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:07:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-10-01 00:07:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-01 00:07:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-01 00:07:56,522 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 21 [2018-10-01 00:07:56,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:56,522 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-01 00:07:56,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:56,522 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-01 00:07:56,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:56,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:56,522 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1] [2018-10-01 00:07:56,522 INFO L423 AbstractCegarLoop]: === Iteration 576 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:56,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:56,522 INFO L82 PathProgramCache]: Analyzing trace with hash -255758403, now seen corresponding path program 558 times [2018-10-01 00:07:56,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:56,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:56,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:56,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:56,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:56,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:56,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:56,608 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:07:56,619 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:07:56,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:07:56,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:56,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:56,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:56,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:56,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:56,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:56,644 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 12 states. [2018-10-01 00:07:58,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:07:58,504 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:07:58,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:07:58,504 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:07:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:07:58,505 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:07:58,505 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:07:58,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:07:59,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 00:07:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:07:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:07:59,528 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:07:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:07:59,529 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:07:59,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:07:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:07:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:07:59,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:07:59,529 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:07:59,529 INFO L423 AbstractCegarLoop]: === Iteration 577 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:07:59,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:07:59,529 INFO L82 PathProgramCache]: Analyzing trace with hash -255756481, now seen corresponding path program 559 times [2018-10-01 00:07:59,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:07:59,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:07:59,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:59,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:07:59,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:07:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:59,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:07:59,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:07:59,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:07:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:07:59,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:07:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:07:59,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:07:59,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:07:59,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:07:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:07:59,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:07:59,641 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:08:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:01,384 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:08:01,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:01,384 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:01,385 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:08:01,385 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:08:01,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:08:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 00:08:02,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:08:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:08:02,422 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:08:02,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:02,423 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:08:02,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:02,423 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:08:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:02,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:02,423 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:08:02,423 INFO L423 AbstractCegarLoop]: === Iteration 578 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:02,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:02,423 INFO L82 PathProgramCache]: Analyzing trace with hash -253911361, now seen corresponding path program 560 times [2018-10-01 00:08:02,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:02,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:02,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:02,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:02,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:02,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:02,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:02,513 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:02,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:02,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:02,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:02,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:02,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:02,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:02,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:02,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:02,544 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:08:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:04,339 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:08:04,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:04,339 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:04,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:04,339 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:08:04,340 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:08:04,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:04,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:08:05,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 00:08:05,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:08:05,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:08:05,328 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:08:05,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:05,328 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:08:05,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:08:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:05,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:05,328 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:08:05,328 INFO L423 AbstractCegarLoop]: === Iteration 579 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:05,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:05,328 INFO L82 PathProgramCache]: Analyzing trace with hash -253909439, now seen corresponding path program 561 times [2018-10-01 00:08:05,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:05,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:05,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:05,329 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:05,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:05,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:05,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:05,410 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:05,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:08:05,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:05,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:05,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:05,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:05,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:05,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:05,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:05,445 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:08:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:07,152 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:08:07,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:07,152 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:07,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:07,153 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:08:07,153 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:08:07,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:08:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 00:08:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:08:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:08:08,154 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:08:08,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:08,154 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:08:08,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:08,154 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:08:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:08,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:08,154 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:08:08,154 INFO L423 AbstractCegarLoop]: === Iteration 580 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:08,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1519248959, now seen corresponding path program 562 times [2018-10-01 00:08:08,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:08,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:08,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:08,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:08,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:08,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:08,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:08,246 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:08,253 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:08,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:08,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:08,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:08,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:08,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:08,275 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:08:10,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:10,137 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:08:10,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:10,137 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:10,137 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:08:10,137 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:08:10,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:10,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:08:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 00:08:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:08:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:08:11,110 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:08:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:11,111 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:08:11,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:08:11,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:11,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:11,111 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:08:11,111 INFO L423 AbstractCegarLoop]: === Iteration 581 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:11,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:11,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1519250881, now seen corresponding path program 563 times [2018-10-01 00:08:11,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:11,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:11,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:11,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:11,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:11,216 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:11,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:11,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:11,226 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:08:11,236 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:08:11,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:11,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:11,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:11,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:11,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:11,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:11,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:11,260 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:08:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:13,077 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:08:13,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:13,077 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:13,077 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:08:13,077 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:08:13,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:08:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 00:08:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:08:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:08:14,026 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:08:14,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:14,026 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:08:14,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:08:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:14,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:14,026 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:08:14,026 INFO L423 AbstractCegarLoop]: === Iteration 582 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:14,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:14,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1521096001, now seen corresponding path program 564 times [2018-10-01 00:08:14,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:14,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:14,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:14,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:14,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:14,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:14,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:14,113 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:08:14,123 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:08:14,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:14,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:14,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:14,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:14,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:14,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:14,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:14,148 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:08:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:15,883 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:08:15,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:15,883 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:15,883 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:08:15,883 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:08:15,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:08:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 00:08:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:08:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:08:16,846 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:08:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:16,846 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:08:16,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:08:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:16,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:16,847 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:08:16,847 INFO L423 AbstractCegarLoop]: === Iteration 583 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:16,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:16,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1521097923, now seen corresponding path program 565 times [2018-10-01 00:08:16,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:16,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:16,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:16,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:16,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:16,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:16,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:16,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:16,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:16,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:16,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:16,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:16,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:16,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:16,975 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:08:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:18,698 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:08:18,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:18,698 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:18,698 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:08:18,698 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:08:18,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:18,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:08:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 00:08:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:08:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:08:19,630 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 00:08:19,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:19,630 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:08:19,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:08:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:19,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:19,631 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:08:19,631 INFO L423 AbstractCegarLoop]: === Iteration 584 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:19,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:19,631 INFO L82 PathProgramCache]: Analyzing trace with hash 424299967, now seen corresponding path program 566 times [2018-10-01 00:08:19,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:19,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:19,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:19,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:19,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:19,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:19,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:19,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:19,759 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:19,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:19,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:19,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:19,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:19,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:19,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:19,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:19,782 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 00:08:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:21,443 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:08:21,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:21,443 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:21,443 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:08:21,443 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:08:21,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:08:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2018-10-01 00:08:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:08:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:08:22,433 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:08:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:22,433 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:08:22,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:08:22,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:22,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:22,433 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:08:22,433 INFO L423 AbstractCegarLoop]: === Iteration 585 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:22,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:22,434 INFO L82 PathProgramCache]: Analyzing trace with hash 424301889, now seen corresponding path program 567 times [2018-10-01 00:08:22,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:22,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:22,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:22,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:22,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:22,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:22,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:22,516 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:22,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:08:22,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:22,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:22,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:22,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:22,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:22,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:22,552 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:08:24,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:24,177 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:08:24,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:24,177 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:24,177 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:08:24,178 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:08:24,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:08:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 00:08:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:08:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:08:25,191 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:08:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:25,192 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:08:25,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:08:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:25,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:25,192 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:08:25,192 INFO L423 AbstractCegarLoop]: === Iteration 586 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:25,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:25,192 INFO L82 PathProgramCache]: Analyzing trace with hash 426147009, now seen corresponding path program 568 times [2018-10-01 00:08:25,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:25,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:25,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:25,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:25,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:25,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:25,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:25,296 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:25,301 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:25,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:25,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:25,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:25,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:25,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:25,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:25,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:25,325 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:08:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:27,034 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:08:27,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:27,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:27,034 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:08:27,034 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:08:27,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:08:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2018-10-01 00:08:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:08:28,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:08:28,048 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:08:28,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:28,048 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:08:28,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:28,049 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:08:28,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:28,049 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:28,049 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:08:28,049 INFO L423 AbstractCegarLoop]: === Iteration 587 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:28,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:28,049 INFO L82 PathProgramCache]: Analyzing trace with hash 426148931, now seen corresponding path program 569 times [2018-10-01 00:08:28,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:28,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:28,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:28,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:28,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:28,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:28,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:28,134 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:08:28,145 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:08:28,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:28,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:28,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:28,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:28,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:28,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:28,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:28,170 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:08:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:29,770 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:08:29,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:29,770 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:29,770 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:08:29,770 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:08:29,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:08:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 00:08:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:08:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:08:30,749 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:08:30,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:30,749 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:08:30,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:30,749 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:08:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:30,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:30,749 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:08:30,750 INFO L423 AbstractCegarLoop]: === Iteration 588 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:30,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:30,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2095659967, now seen corresponding path program 570 times [2018-10-01 00:08:30,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:30,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:30,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:30,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:30,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:30,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:30,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:30,835 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:08:30,846 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:08:30,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:30,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:30,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:30,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:30,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:30,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:30,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:30,871 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:08:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:32,467 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:08:32,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:32,467 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:32,468 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:08:32,468 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:08:32,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:08:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-10-01 00:08:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:08:33,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:08:33,498 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:08:33,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:33,499 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:08:33,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:33,499 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:08:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:33,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:33,499 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:08:33,499 INFO L423 AbstractCegarLoop]: === Iteration 589 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:33,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash -2095658045, now seen corresponding path program 571 times [2018-10-01 00:08:33,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:33,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:33,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:33,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:33,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:33,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:33,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:33,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:33,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:33,629 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:33,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:33,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:33,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:33,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:33,629 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:08:35,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:35,222 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:08:35,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:35,222 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:35,223 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:08:35,223 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:08:35,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:35,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:08:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 00:08:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:08:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:08:36,257 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:08:36,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:36,257 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:08:36,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:08:36,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:36,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:36,258 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:08:36,258 INFO L423 AbstractCegarLoop]: === Iteration 590 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:36,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:36,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2093812925, now seen corresponding path program 572 times [2018-10-01 00:08:36,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:36,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:36,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:36,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:36,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:36,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:36,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:36,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:36,384 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:36,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:36,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:36,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:36,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:36,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:36,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:36,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:36,408 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:08:37,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:37,835 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:08:37,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:37,835 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:37,835 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:08:37,835 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:08:37,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:08:38,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-01 00:08:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:08:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:08:38,806 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:08:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:38,806 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:08:38,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:08:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:38,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:38,806 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:08:38,806 INFO L423 AbstractCegarLoop]: === Iteration 591 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:38,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:38,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2093811003, now seen corresponding path program 573 times [2018-10-01 00:08:38,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:38,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:38,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:38,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:38,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:38,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:38,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:38,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:38,897 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:08:38,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:38,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:38,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:38,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:38,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:38,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:38,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:38,921 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:08:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:40,422 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:08:40,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:40,422 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:40,422 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:08:40,422 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:08:40,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:08:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-01 00:08:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:08:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:08:41,246 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 21 [2018-10-01 00:08:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:41,246 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:08:41,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:41,246 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:08:41,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:41,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:41,246 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:08:41,246 INFO L423 AbstractCegarLoop]: === Iteration 592 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:41,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:41,247 INFO L82 PathProgramCache]: Analyzing trace with hash 445306175, now seen corresponding path program 574 times [2018-10-01 00:08:41,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:41,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:41,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:41,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:41,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:41,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:41,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:41,331 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:41,336 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:41,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:41,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:41,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:41,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:41,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:41,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:41,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:41,360 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 12 states. [2018-10-01 00:08:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:43,231 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:08:43,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:43,231 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:43,231 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:08:43,231 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:08:43,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:08:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 00:08:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:08:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:08:44,205 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:08:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:44,205 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:08:44,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:08:44,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:44,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:44,205 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:08:44,206 INFO L423 AbstractCegarLoop]: === Iteration 593 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:44,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:44,206 INFO L82 PathProgramCache]: Analyzing trace with hash 445308097, now seen corresponding path program 575 times [2018-10-01 00:08:44,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:44,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:44,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:44,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:44,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:44,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:44,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:44,295 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:08:44,307 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:08:44,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:44,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:44,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:44,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:44,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:44,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:44,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:44,332 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:08:46,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:46,163 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:08:46,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:46,163 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:46,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:46,163 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:08:46,163 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:08:46,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:08:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 00:08:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:08:47,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:08:47,194 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:08:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:47,194 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:08:47,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:47,195 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:08:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:47,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:47,195 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:08:47,195 INFO L423 AbstractCegarLoop]: === Iteration 594 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:47,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:47,195 INFO L82 PathProgramCache]: Analyzing trace with hash 447153217, now seen corresponding path program 576 times [2018-10-01 00:08:47,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:47,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:47,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:47,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:47,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:47,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:47,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:47,280 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:08:47,289 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:08:47,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:47,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:47,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:47,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:47,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:47,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:47,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:47,313 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:08:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:49,122 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:08:49,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:49,122 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:49,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:49,122 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:08:49,122 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:08:49,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:49,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:08:50,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 00:08:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:08:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:08:50,161 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:08:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:50,161 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:08:50,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:50,161 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:08:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:50,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:50,161 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:08:50,162 INFO L423 AbstractCegarLoop]: === Iteration 595 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:50,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:50,162 INFO L82 PathProgramCache]: Analyzing trace with hash 447155139, now seen corresponding path program 577 times [2018-10-01 00:08:50,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:50,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:50,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:50,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:50,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:50,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:50,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:50,329 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:50,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:50,359 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:50,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:50,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:50,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:50,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:50,360 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:08:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:52,071 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:08:52,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:52,071 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:52,072 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:08:52,072 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:08:52,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:52,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:08:53,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-01 00:08:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:08:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:08:53,017 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:08:53,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:53,017 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:08:53,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:53,017 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:08:53,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:53,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:53,018 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:08:53,018 INFO L423 AbstractCegarLoop]: === Iteration 596 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:53,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:53,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2074653759, now seen corresponding path program 578 times [2018-10-01 00:08:53,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:53,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:53,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:53,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:08:53,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:53,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:53,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:53,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:08:53,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:08:53,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:53,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:53,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:53,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:53,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:53,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:53,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:53,133 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:08:55,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:55,014 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:08:55,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:55,014 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:55,014 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:08:55,014 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:08:55,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:55,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:08:56,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2018-10-01 00:08:56,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:08:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:08:56,078 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:08:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:56,078 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:08:56,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:08:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:56,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:56,079 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:08:56,079 INFO L423 AbstractCegarLoop]: === Iteration 597 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:56,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:56,079 INFO L82 PathProgramCache]: Analyzing trace with hash -2074651837, now seen corresponding path program 579 times [2018-10-01 00:08:56,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:56,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:56,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:56,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:56,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:56,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:56,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:56,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:08:56,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:08:56,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:56,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:56,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:56,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:56,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:56,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:56,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:56,200 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:08:58,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:08:58,084 INFO L93 Difference]: Finished difference Result 65 states and 94 transitions. [2018-10-01 00:08:58,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:08:58,084 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:08:58,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:08:58,084 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:08:58,084 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:08:58,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:58,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:08:59,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2018-10-01 00:08:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:08:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:08:59,068 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:08:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:08:59,069 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:08:59,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:08:59,069 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:08:59,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:08:59,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:08:59,069 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:08:59,069 INFO L423 AbstractCegarLoop]: === Iteration 598 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:08:59,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:08:59,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2072806717, now seen corresponding path program 580 times [2018-10-01 00:08:59,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:08:59,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:08:59,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:59,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:08:59,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:08:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:08:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:59,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:08:59,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:08:59,151 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:08:59,157 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:08:59,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:08:59,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:08:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:08:59,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:08:59,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:08:59,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:08:59,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:08:59,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:08:59,180 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:09:01,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:01,007 INFO L93 Difference]: Finished difference Result 63 states and 91 transitions. [2018-10-01 00:09:01,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:01,007 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:01,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:01,008 INFO L225 Difference]: With dead ends: 63 [2018-10-01 00:09:01,008 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:09:01,008 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:01,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:09:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2018-10-01 00:09:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:09:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:09:02,108 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:09:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:02,108 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:09:02,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:02,108 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:09:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:02,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:02,108 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:02,108 INFO L423 AbstractCegarLoop]: === Iteration 599 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:02,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2072804795, now seen corresponding path program 581 times [2018-10-01 00:09:02,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:02,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:02,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:02,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:02,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:02,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:02,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:02,192 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:09:02,203 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:09:02,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:02,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:02,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:02,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:02,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:02,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:02,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:02,228 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:09:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:03,950 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:09:03,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:03,950 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:03,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:03,950 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:09:03,950 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:09:03,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:09:04,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-01 00:09:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:09:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:09:04,845 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 00:09:04,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:04,845 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:09:04,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:04,845 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:09:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:04,845 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:04,846 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:09:04,846 INFO L423 AbstractCegarLoop]: === Iteration 600 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:04,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:04,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1125364545, now seen corresponding path program 582 times [2018-10-01 00:09:04,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:04,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:04,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:04,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:04,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:04,921 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:04,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:04,927 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:09:04,938 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:09:04,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:04,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:04,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:04,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:04,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:04,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:04,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:04,961 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 00:09:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:06,744 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:09:06,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:06,744 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:06,745 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:09:06,745 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:09:06,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:06,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:09:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2018-10-01 00:09:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:09:07,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:09:07,840 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:09:07,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:07,840 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:09:07,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:09:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:07,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:07,840 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:07,840 INFO L423 AbstractCegarLoop]: === Iteration 601 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:07,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:07,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1125366467, now seen corresponding path program 583 times [2018-10-01 00:09:07,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:07,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:07,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:07,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:07,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:07,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:07,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:07,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:07,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:07,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:07,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:07,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:07,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:07,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:07,955 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:09:09,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:09,624 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:09:09,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:09,624 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:09,624 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:09:09,624 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:09:09,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:09,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:09:10,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2018-10-01 00:09:10,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:09:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:09:10,708 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:09:10,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:10,708 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:09:10,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:09:10,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:10,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:10,708 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:10,709 INFO L423 AbstractCegarLoop]: === Iteration 602 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:10,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:10,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1127211587, now seen corresponding path program 584 times [2018-10-01 00:09:10,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:10,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:10,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:10,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:10,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:10,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:10,837 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:10,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:09:10,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:09:10,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:10,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:10,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:10,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:10,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:10,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:10,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:10,876 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:09:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:12,651 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-01 00:09:12,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:12,651 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:12,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:12,651 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:09:12,652 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:09:12,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:09:13,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2018-10-01 00:09:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:09:13,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:09:13,683 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:09:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:13,683 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:09:13,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:13,684 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:09:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:13,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:13,684 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:13,684 INFO L423 AbstractCegarLoop]: === Iteration 603 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:13,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:13,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1127213509, now seen corresponding path program 585 times [2018-10-01 00:09:13,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:13,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:13,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:13,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:13,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:13,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:13,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:13,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:09:13,793 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:09:13,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:13,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:13,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:13,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:13,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:13,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:13,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:13,818 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:09:15,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:15,468 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:09:15,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:15,468 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:15,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:15,469 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:09:15,469 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:09:15,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:15,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:09:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-01 00:09:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:09:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:09:16,490 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:09:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:16,490 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:09:16,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:09:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:16,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:16,491 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:16,491 INFO L423 AbstractCegarLoop]: === Iteration 604 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:16,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:16,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1394595389, now seen corresponding path program 586 times [2018-10-01 00:09:16,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:16,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:16,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:16,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:16,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:16,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:16,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:16,578 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:09:16,584 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:09:16,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:16,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:16,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:16,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:16,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:16,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:16,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:16,607 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:09:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:18,224 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:09:18,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:18,224 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:18,224 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:09:18,224 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:09:18,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:09:19,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-10-01 00:09:19,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:09:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:09:19,259 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:09:19,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:19,259 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:09:19,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:19,259 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:09:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:19,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:19,259 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:19,260 INFO L423 AbstractCegarLoop]: === Iteration 605 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:19,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1394593467, now seen corresponding path program 587 times [2018-10-01 00:09:19,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:19,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:19,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:19,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:19,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:19,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:19,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:19,345 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:09:19,355 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:09:19,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:19,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:19,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:19,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:19,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:19,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:19,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:19,379 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:09:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:20,975 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:09:20,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:20,975 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:20,975 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:09:20,975 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:09:20,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:09:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 00:09:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:09:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:09:22,039 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:09:22,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:22,039 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:09:22,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:09:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:22,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:22,039 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:22,039 INFO L423 AbstractCegarLoop]: === Iteration 606 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:22,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:22,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1392748347, now seen corresponding path program 588 times [2018-10-01 00:09:22,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:22,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:22,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:22,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:22,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:22,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:22,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:22,145 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:09:22,156 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:09:22,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:22,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:22,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:22,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:22,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:22,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:22,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:22,181 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:09:23,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:23,710 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:09:23,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:23,710 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:23,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:23,710 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:09:23,711 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:09:23,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:09:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-01 00:09:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:09:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:09:24,698 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:09:24,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:24,698 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:09:24,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:24,698 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:09:24,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:24,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:24,699 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:09:24,699 INFO L423 AbstractCegarLoop]: === Iteration 607 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:24,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:24,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1392746425, now seen corresponding path program 589 times [2018-10-01 00:09:24,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:24,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:24,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:24,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:24,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:24,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:24,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:24,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:24,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:24,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:24,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:24,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:24,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:24,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:24,813 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:09:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:26,271 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:09:26,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:26,271 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:26,271 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:09:26,271 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:09:26,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:26,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:09:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-10-01 00:09:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-01 00:09:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-01 00:09:26,992 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 21 [2018-10-01 00:09:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:26,993 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-01 00:09:26,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-01 00:09:26,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:26,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:26,993 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:09:26,993 INFO L423 AbstractCegarLoop]: === Iteration 608 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:26,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:26,993 INFO L82 PathProgramCache]: Analyzing trace with hash -842564417, now seen corresponding path program 590 times [2018-10-01 00:09:26,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:26,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:26,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:26,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:26,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:27,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:27,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:27,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:09:27,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:09:27,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:27,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:27,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:27,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:27,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:27,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:27,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:27,132 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 12 states. [2018-10-01 00:09:28,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:28,808 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:09:28,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:28,808 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:28,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:28,809 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:09:28,809 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:09:28,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:28,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:09:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2018-10-01 00:09:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:09:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:09:29,856 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:09:29,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:29,856 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:09:29,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:29,856 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:09:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:29,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:29,856 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:09:29,857 INFO L423 AbstractCegarLoop]: === Iteration 609 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:29,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:29,857 INFO L82 PathProgramCache]: Analyzing trace with hash -842562495, now seen corresponding path program 591 times [2018-10-01 00:09:29,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:29,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:29,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:29,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:29,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:29,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:29,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:29,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:09:29,956 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:09:29,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:29,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:29,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:29,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:29,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:29,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:29,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:29,982 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:09:31,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:31,564 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:09:31,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:31,564 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:31,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:31,564 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:09:31,564 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:09:31,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:09:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 00:09:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:09:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:09:32,560 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:09:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:32,560 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:09:32,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:09:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:32,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:32,560 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:09:32,560 INFO L423 AbstractCegarLoop]: === Iteration 610 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:32,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:32,561 INFO L82 PathProgramCache]: Analyzing trace with hash -840717375, now seen corresponding path program 592 times [2018-10-01 00:09:32,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:32,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:32,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:32,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:32,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:32,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:32,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:32,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:09:32,651 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:09:32,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:32,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:32,672 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:32,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:32,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:32,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:32,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:32,673 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:09:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:34,364 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:09:34,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:34,364 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:34,364 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:09:34,364 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:09:34,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:34,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:09:35,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2018-10-01 00:09:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:09:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:09:35,495 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:09:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:35,495 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:09:35,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:09:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:35,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:35,496 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:35,496 INFO L423 AbstractCegarLoop]: === Iteration 611 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:35,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash -840715453, now seen corresponding path program 593 times [2018-10-01 00:09:35,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:35,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:35,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:35,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:35,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:35,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:35,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:35,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:09:35,590 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:09:35,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:35,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:35,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:35,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:35,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:35,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:35,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:35,614 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:09:37,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:37,241 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:09:37,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:37,241 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:37,242 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:09:37,242 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:09:37,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:09:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 00:09:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:09:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:09:38,276 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:09:38,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:38,276 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:09:38,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:38,276 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:09:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:38,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:38,276 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:09:38,276 INFO L423 AbstractCegarLoop]: === Iteration 612 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:38,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:38,277 INFO L82 PathProgramCache]: Analyzing trace with hash 932442945, now seen corresponding path program 594 times [2018-10-01 00:09:38,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:38,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:38,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:38,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:38,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:38,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:38,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:38,360 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:09:38,373 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:09:38,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:38,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:38,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:38,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:38,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:38,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:38,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:38,397 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:09:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:39,941 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:09:39,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:39,941 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:39,941 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:09:39,941 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:09:39,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:39,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:09:41,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-01 00:09:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:09:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:09:41,075 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:09:41,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:41,075 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:09:41,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:41,075 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:09:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:41,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:41,075 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:41,075 INFO L423 AbstractCegarLoop]: === Iteration 613 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:41,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:41,076 INFO L82 PathProgramCache]: Analyzing trace with hash 932444867, now seen corresponding path program 595 times [2018-10-01 00:09:41,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:41,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:41,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:41,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:41,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:41,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:41,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:41,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:41,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:41,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:41,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:41,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:41,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:41,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:41,191 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:09:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:42,725 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:09:42,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:42,725 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:42,725 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:09:42,726 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:09:42,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:09:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2018-10-01 00:09:43,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:09:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:09:43,823 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:09:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:43,823 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:09:43,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:09:43,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:43,824 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:43,824 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:43,824 INFO L423 AbstractCegarLoop]: === Iteration 614 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:43,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:43,824 INFO L82 PathProgramCache]: Analyzing trace with hash 934289987, now seen corresponding path program 596 times [2018-10-01 00:09:43,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:43,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:43,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:43,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:43,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:43,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:43,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:43,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:09:43,911 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:09:43,911 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:43,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:43,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:43,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:43,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:43,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:43,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:43,935 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:09:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:45,358 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:09:45,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:45,358 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:45,358 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:09:45,359 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:09:45,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:45,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:09:46,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2018-10-01 00:09:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:09:46,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:09:46,414 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:09:46,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:46,414 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:09:46,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:09:46,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:46,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:46,414 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:46,415 INFO L423 AbstractCegarLoop]: === Iteration 615 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:46,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:46,415 INFO L82 PathProgramCache]: Analyzing trace with hash 934291909, now seen corresponding path program 597 times [2018-10-01 00:09:46,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:46,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:46,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:46,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:46,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:46,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:46,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:46,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:09:46,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:09:46,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:46,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:46,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:46,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:46,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:46,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:46,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:46,551 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:09:47,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:47,969 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:09:47,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:47,969 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:47,969 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:09:47,969 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:09:47,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:47,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:09:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-01 00:09:48,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:09:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:09:48,924 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 00:09:48,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:48,924 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:09:48,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:48,925 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:09:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:48,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:48,925 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:09:48,925 INFO L423 AbstractCegarLoop]: === Iteration 616 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:48,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash -162506047, now seen corresponding path program 598 times [2018-10-01 00:09:48,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:48,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:48,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:48,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:48,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:49,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:49,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:49,011 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:09:49,017 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:09:49,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:49,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:49,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:49,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:49,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:49,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:49,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:49,041 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 00:09:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:50,750 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:09:50,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:50,750 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:50,750 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:09:50,750 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:09:50,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:50,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:09:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2018-10-01 00:09:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:09:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:09:51,855 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:09:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:51,855 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:09:51,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:51,855 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:09:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:51,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:51,855 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:51,855 INFO L423 AbstractCegarLoop]: === Iteration 617 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:51,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:51,855 INFO L82 PathProgramCache]: Analyzing trace with hash -162504125, now seen corresponding path program 599 times [2018-10-01 00:09:51,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:51,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:51,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:51,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:51,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:52,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:52,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:52,025 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:09:52,035 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:09:52,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:52,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:52,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:52,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:52,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:52,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:52,059 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:09:53,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:53,667 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:09:53,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:53,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:53,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:53,668 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:09:53,668 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:09:53,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:09:54,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 36. [2018-10-01 00:09:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:09:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:09:54,770 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:09:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:54,771 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:09:54,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:09:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:54,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:54,771 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:54,771 INFO L423 AbstractCegarLoop]: === Iteration 618 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:54,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:54,771 INFO L82 PathProgramCache]: Analyzing trace with hash -160659005, now seen corresponding path program 600 times [2018-10-01 00:09:54,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:54,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:54,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:54,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:54,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:54,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:54,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:54,851 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:09:54,862 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:09:54,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:09:54,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:54,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:54,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:54,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:54,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:54,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:54,887 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:09:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:56,554 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-01 00:09:56,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:56,554 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:56,554 INFO L225 Difference]: With dead ends: 59 [2018-10-01 00:09:56,555 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:09:56,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:56,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:09:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2018-10-01 00:09:57,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:09:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:09:57,648 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:09:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:09:57,648 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:09:57,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:09:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:09:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:09:57,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:09:57,648 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:09:57,649 INFO L423 AbstractCegarLoop]: === Iteration 619 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:09:57,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:09:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash -160657083, now seen corresponding path program 601 times [2018-10-01 00:09:57,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:09:57,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:09:57,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:57,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:09:57,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:09:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:57,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:09:57,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:09:57,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:09:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:09:57,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:09:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:09:57,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:09:57,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:09:57,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:09:57,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:09:57,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:57,760 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:09:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:09:59,399 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-01 00:09:59,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:09:59,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:09:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:09:59,399 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:09:59,400 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:09:59,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:09:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:10:00,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-01 00:10:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:10:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:10:00,402 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:10:00,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:00,402 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:10:00,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:10:00,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:00,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:00,402 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:00,403 INFO L423 AbstractCegarLoop]: === Iteration 620 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:00,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:00,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1612501315, now seen corresponding path program 602 times [2018-10-01 00:10:00,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:00,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:00,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:00,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:00,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:00,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:00,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:00,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:10:00,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:10:00,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:00,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:00,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:00,520 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:00,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:00,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:00,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:00,520 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:10:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:02,025 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:10:02,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:02,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:02,025 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:10:02,025 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:10:02,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:10:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2018-10-01 00:10:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:10:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:10:03,145 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:10:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:03,145 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:10:03,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:10:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:03,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:03,145 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:03,145 INFO L423 AbstractCegarLoop]: === Iteration 621 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:03,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:03,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1612503237, now seen corresponding path program 603 times [2018-10-01 00:10:03,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:03,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:03,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:03,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:03,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:03,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:03,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:03,230 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:10:03,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:10:03,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:03,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:03,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:03,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:03,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:03,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:03,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:03,265 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:10:04,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:04,826 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-01 00:10:04,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:04,826 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:04,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:04,826 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:10:04,827 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:10:04,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:10:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2018-10-01 00:10:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:10:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:10:05,853 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:10:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:05,853 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:10:05,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:10:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:05,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:05,853 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:05,853 INFO L423 AbstractCegarLoop]: === Iteration 622 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:05,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1614348357, now seen corresponding path program 604 times [2018-10-01 00:10:05,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:05,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:05,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:05,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:05,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:05,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:05,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:05,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:10:05,942 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:10:05,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:05,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:05,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:05,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:05,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:05,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:05,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:05,965 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:10:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:07,445 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:10:07,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:07,445 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:07,445 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:10:07,446 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:10:07,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:10:08,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2018-10-01 00:10:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:10:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:10:08,532 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:10:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:08,532 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:10:08,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:10:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:08,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:08,532 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:10:08,532 INFO L423 AbstractCegarLoop]: === Iteration 623 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:08,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:08,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1614350279, now seen corresponding path program 605 times [2018-10-01 00:10:08,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:08,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:08,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:08,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:08,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:08,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:08,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:08,616 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:10:08,628 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:10:08,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:08,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:08,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:08,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:08,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:08,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:08,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:08,652 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:10:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:10,068 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:10:10,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:10,068 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:10,068 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:10:10,068 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:10:10,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:10,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:10:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-01 00:10:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-01 00:10:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-01 00:10:10,949 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 21 [2018-10-01 00:10:10,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:10,949 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-01 00:10:10,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-01 00:10:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:10,949 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:10,949 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:10:10,949 INFO L423 AbstractCegarLoop]: === Iteration 624 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:10,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash -141499839, now seen corresponding path program 606 times [2018-10-01 00:10:10,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:10,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:10,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:10,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:10,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:11,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:11,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:11,030 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:10:11,154 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:10:11,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:11,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:11,157 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:11,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:11,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:11,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:11,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:11,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:11,178 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 12 states. [2018-10-01 00:10:12,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:12,618 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:10:12,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:12,618 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:12,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:12,618 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:10:12,619 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:10:12,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:12,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:10:13,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2018-10-01 00:10:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:10:13,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:10:13,747 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:10:13,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:13,747 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:10:13,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:10:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:13,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:13,747 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:13,747 INFO L423 AbstractCegarLoop]: === Iteration 625 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:13,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:13,747 INFO L82 PathProgramCache]: Analyzing trace with hash -141497917, now seen corresponding path program 607 times [2018-10-01 00:10:13,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:13,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:13,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:13,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:13,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:13,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:13,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:13,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:13,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:13,868 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:13,868 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:13,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:13,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:13,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:13,868 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:10:15,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:15,321 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:10:15,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:15,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:15,321 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:10:15,322 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:10:15,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:10:16,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2018-10-01 00:10:16,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:10:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:10:16,415 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:10:16,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:16,415 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:10:16,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:10:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:16,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:16,416 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:16,416 INFO L423 AbstractCegarLoop]: === Iteration 626 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:16,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:16,416 INFO L82 PathProgramCache]: Analyzing trace with hash -139652797, now seen corresponding path program 608 times [2018-10-01 00:10:16,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:16,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:16,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:16,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:16,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:16,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:16,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:16,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:10:16,539 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:10:16,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:16,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:16,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:16,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:16,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:16,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:16,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:16,563 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:10:17,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:17,933 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:10:17,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:17,933 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:17,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:17,934 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:10:17,934 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:10:17,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:10:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2018-10-01 00:10:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:10:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:10:19,056 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:10:19,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:19,056 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:10:19,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:10:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:19,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:19,057 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:19,057 INFO L423 AbstractCegarLoop]: === Iteration 627 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:19,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash -139650875, now seen corresponding path program 609 times [2018-10-01 00:10:19,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:19,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:19,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:19,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:19,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:19,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:19,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:19,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:10:19,154 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:10:19,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:19,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:19,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:19,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:19,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:19,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:19,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:19,177 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:10:20,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:20,527 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:10:20,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:20,527 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:20,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:20,528 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:10:20,528 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:10:20,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:20,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:10:21,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-01 00:10:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:10:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:10:21,554 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:10:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:21,554 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:10:21,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:10:21,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:21,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:21,554 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:21,554 INFO L423 AbstractCegarLoop]: === Iteration 628 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:21,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:21,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1633507523, now seen corresponding path program 610 times [2018-10-01 00:10:21,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:21,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:21,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:21,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:21,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:21,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:21,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:21,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:10:21,646 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:10:21,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:21,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:21,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:21,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:21,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:21,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:21,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:21,670 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:10:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:23,174 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:10:23,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:23,174 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:23,175 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:10:23,175 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:10:23,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:10:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2018-10-01 00:10:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:10:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:10:24,284 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:10:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:24,285 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:10:24,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:10:24,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:24,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:24,285 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:24,285 INFO L423 AbstractCegarLoop]: === Iteration 629 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:24,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:24,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1633509445, now seen corresponding path program 611 times [2018-10-01 00:10:24,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:24,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:24,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:24,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:24,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:24,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:24,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:24,388 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:10:24,398 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:10:24,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:24,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:24,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:24,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:24,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:24,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:24,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:24,422 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:10:25,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:25,866 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-01 00:10:25,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:25,866 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:25,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:25,866 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:10:25,866 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:10:25,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:10:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2018-10-01 00:10:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:10:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:10:26,956 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:10:26,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:26,956 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:10:26,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:26,956 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:10:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:26,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:26,956 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:26,956 INFO L423 AbstractCegarLoop]: === Iteration 630 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:26,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:26,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1635354565, now seen corresponding path program 612 times [2018-10-01 00:10:26,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:26,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:26,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:26,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:26,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:27,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:27,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:27,038 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:10:27,050 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:10:27,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:27,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:27,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:27,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:27,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:27,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:27,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:27,075 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:10:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:28,499 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-01 00:10:28,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:28,499 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:28,499 INFO L225 Difference]: With dead ends: 51 [2018-10-01 00:10:28,500 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:10:28,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:10:29,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2018-10-01 00:10:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:10:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:10:29,639 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:10:29,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:29,639 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:10:29,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:10:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:29,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:29,639 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:10:29,639 INFO L423 AbstractCegarLoop]: === Iteration 631 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:29,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:29,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1635356487, now seen corresponding path program 613 times [2018-10-01 00:10:29,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:29,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:29,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:29,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:29,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:29,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:29,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:29,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:29,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:29,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:29,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:29,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:29,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:29,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:29,749 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:10:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:31,117 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:10:31,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:31,117 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:31,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:31,117 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:10:31,118 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:10:31,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:10:32,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-01 00:10:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-01 00:10:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-01 00:10:32,039 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 21 [2018-10-01 00:10:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:32,039 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-01 00:10:32,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:32,039 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-01 00:10:32,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:32,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:32,040 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:32,040 INFO L423 AbstractCegarLoop]: === Iteration 632 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:32,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash 538558531, now seen corresponding path program 614 times [2018-10-01 00:10:32,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:32,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:32,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:32,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:32,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:32,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:32,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:32,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:10:32,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:10:32,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:32,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:32,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:32,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:32,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:32,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:32,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:32,155 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 12 states. [2018-10-01 00:10:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:33,477 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:10:33,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:33,477 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:33,477 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:10:33,478 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:10:33,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:33,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:10:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2018-10-01 00:10:34,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:10:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:10:34,594 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:10:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:34,594 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:10:34,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:34,595 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:10:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:34,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:34,595 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:34,595 INFO L423 AbstractCegarLoop]: === Iteration 633 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:34,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:34,595 INFO L82 PathProgramCache]: Analyzing trace with hash 538560453, now seen corresponding path program 615 times [2018-10-01 00:10:34,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:34,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:34,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:34,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:34,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:34,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:34,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:34,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:10:34,686 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:10:34,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:34,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:34,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:34,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:34,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:34,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:34,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:34,711 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:10:36,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:36,013 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 00:10:36,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:36,013 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:36,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:36,013 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:10:36,013 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:10:36,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:10:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2018-10-01 00:10:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:10:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:10:37,126 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:10:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:37,126 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:10:37,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:10:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:37,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:37,126 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:37,126 INFO L423 AbstractCegarLoop]: === Iteration 634 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:37,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:37,127 INFO L82 PathProgramCache]: Analyzing trace with hash 540405573, now seen corresponding path program 616 times [2018-10-01 00:10:37,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:37,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:37,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:37,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:37,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:37,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:37,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:37,209 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:10:37,216 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:10:37,216 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:37,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:37,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:37,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:37,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:37,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:37,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:37,241 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:10:38,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:38,552 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-01 00:10:38,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:38,552 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:38,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:38,553 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:10:38,553 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:10:38,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:10:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2018-10-01 00:10:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:10:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:10:39,613 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:10:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:39,614 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:10:39,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:10:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:39,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:39,614 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:10:39,614 INFO L423 AbstractCegarLoop]: === Iteration 635 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:39,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:39,614 INFO L82 PathProgramCache]: Analyzing trace with hash 540407495, now seen corresponding path program 617 times [2018-10-01 00:10:39,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:39,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:39,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:39,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:39,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:39,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:39,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:39,695 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:10:39,705 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:10:39,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:39,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:39,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:39,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:39,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:39,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:39,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:39,729 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:10:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:40,995 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-01 00:10:40,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:40,995 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:40,995 INFO L225 Difference]: With dead ends: 47 [2018-10-01 00:10:40,996 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:10:40,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:10:41,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-01 00:10:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-01 00:10:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-01 00:10:41,994 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 21 [2018-10-01 00:10:41,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:41,994 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-01 00:10:41,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:41,994 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-01 00:10:41,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:41,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:41,994 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1] [2018-10-01 00:10:41,994 INFO L423 AbstractCegarLoop]: === Iteration 636 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:41,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:41,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1981401403, now seen corresponding path program 618 times [2018-10-01 00:10:41,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:41,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:41,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:41,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:41,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:42,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:42,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:42,074 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:10:42,084 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:10:42,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:42,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:42,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:42,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:42,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:42,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:42,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:42,108 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 12 states. [2018-10-01 00:10:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:43,317 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 00:10:43,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:43,317 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:43,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:43,317 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:10:43,318 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:10:43,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:10:44,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2018-10-01 00:10:44,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:10:44,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:10:44,457 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:10:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:44,457 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:10:44,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:44,457 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:10:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:44,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:44,457 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:10:44,458 INFO L423 AbstractCegarLoop]: === Iteration 637 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:44,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:44,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1981399481, now seen corresponding path program 619 times [2018-10-01 00:10:44,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:44,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:44,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:44,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:44,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:44,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:44,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:44,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:44,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:44,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:44,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:44,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:44,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:44,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:44,569 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. [2018-10-01 00:10:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:45,765 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-01 00:10:45,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:45,765 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:45,765 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:10:45,766 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:10:45,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:10:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2018-10-01 00:10:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-01 00:10:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-10-01 00:10:46,810 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 21 [2018-10-01 00:10:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:46,810 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-10-01 00:10:46,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-10-01 00:10:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:46,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:46,810 INFO L375 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1] [2018-10-01 00:10:46,811 INFO L423 AbstractCegarLoop]: === Iteration 638 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:46,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:46,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1979554361, now seen corresponding path program 620 times [2018-10-01 00:10:46,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:46,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:46,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:46,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:10:46,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:46,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:46,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:46,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:10:46,897 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:10:46,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:46,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:46,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:46,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:46,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:46,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:46,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:46,922 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 12 states. [2018-10-01 00:10:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:10:48,071 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-01 00:10:48,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:10:48,071 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-10-01 00:10:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:10:48,071 INFO L225 Difference]: With dead ends: 43 [2018-10-01 00:10:48,071 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 00:10:48,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 00:10:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2018-10-01 00:10:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-01 00:10:49,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 55 transitions. [2018-10-01 00:10:49,135 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 55 transitions. Word has length 21 [2018-10-01 00:10:49,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:10:49,135 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 55 transitions. [2018-10-01 00:10:49,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:10:49,135 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 55 transitions. [2018-10-01 00:10:49,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-01 00:10:49,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:10:49,135 INFO L375 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1] [2018-10-01 00:10:49,135 INFO L423 AbstractCegarLoop]: === Iteration 639 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:10:49,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-01 00:10:49,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1979552439, now seen corresponding path program 621 times [2018-10-01 00:10:49,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:10:49,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:10:49,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:49,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:10:49,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:10:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:10:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:49,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:10:49,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:10:49,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:10:49,231 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:10:49,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:10:49,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:10:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:10:49,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:10:49,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:10:49,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:10:49,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:10:49,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-01 00:10:49,256 INFO L87 Difference]: Start difference. First operand 38 states and 55 transitions. Second operand 12 states. Received shutdown request... [2018-10-01 00:10:49,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 00:10:49,486 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:10:49,494 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:10:49,494 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:10:49 BoogieIcfgContainer [2018-10-01 00:10:49,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:10:49,495 INFO L168 Benchmark]: Toolchain (without parser) took 849616.57 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: -897.4 MB). Peak memory consumption was 374.6 MB. Max. memory is 7.1 GB. [2018-10-01 00:10:49,497 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 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. [2018-10-01 00:10:49,497 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.22 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. [2018-10-01 00:10:49,497 INFO L168 Benchmark]: Boogie Preprocessor took 20.53 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. [2018-10-01 00:10:49,497 INFO L168 Benchmark]: RCFGBuilder took 238.85 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. [2018-10-01 00:10:49,498 INFO L168 Benchmark]: TraceAbstraction took 849308.22 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -918.5 MB). Peak memory consumption was 353.4 MB. Max. memory is 7.1 GB. [2018-10-01 00:10:49,500 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 0.19 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 42.22 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 20.53 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 238.85 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 849308.22 ms. Allocated memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: 1.3 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -918.5 MB). Peak memory consumption was 353.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 29]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 29). Cancelled while BasicCegarLoop was constructing difference of abstraction (38states) and FLOYD_HOARE automaton (currently 6 states, 12 states before enhancement), while ReachableStatesComputation was computing reachable states (7 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 849.2s OverallTime, 639 OverallIterations, 9 TraceHistogramMax, 488.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2556 SDtfs, 5372 SDslu, 8718 SDs, 0 SdLazy, 15080 SolverSat, 10661 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 48.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16768 GetRequests, 11391 SyntacticMatches, 0 SemanticMatches, 5377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=512, 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: 271.4s AutomataMinimizationTime, 638 MinimizatonAttempts, 11618 StatesRemovedByMinimization, 638 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 6.0s SatisfiabilityAnalysisTime, 61.5s InterpolantComputationTime, 22783 NumberOfCodeBlocks, 22783 NumberOfCodeBlocksAsserted, 3856 NumberOfCheckSat, 21506 ConstructedInterpolants, 0 QuantifiedInterpolants, 1075112 SizeOfPredicates, 638 NumberOfNonLiveVariables, 29432 ConjunctsInSsa, 6014 ConjunctsInUnsatCore, 1277 InterpolantComputations, 1 PerfectInterpolantSequences, 0/72948 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-10-49-509.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-10-49-509.csv Completed graceful shutdown