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 0.1.23-4eac566 [2018-09-23 19:49:30,716 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:49:30,718 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:49:30,734 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:49:30,734 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:49:30,736 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:49:30,737 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:49:30,740 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:49:30,742 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:49:30,744 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:49:30,747 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:49:30,796 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 [2018-09-23 19:49:30,818 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:49:30,818 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:49:30,819 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:49:30,819 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:49:30,819 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:49:30,820 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:49:30,820 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:49:30,820 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:49:30,820 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:49:30,821 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:49:30,821 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:49:30,821 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:49:30,821 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:49:30,821 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:49:30,822 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:49:30,822 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:49:30,822 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:49:30,822 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:49:30,822 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:49:30,823 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:49:30,823 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:49:30,823 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:49:30,823 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:49:30,823 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:49:30,824 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:49:30,824 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:49:30,824 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:49:30,824 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:49:30,824 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:49:30,825 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:49:30,871 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:49:30,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:49:30,891 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:49:30,893 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:49:30,893 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:49:30,894 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-09-23 19:49:30,895 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-09-23 19:49:30,947 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:49:30,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:49:30,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:49:30,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:49:30,951 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:49:30,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:30" (1/1) ... [2018-09-23 19:49:30,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:30" (1/1) ... [2018-09-23 19:49:30,991 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:49:30,992 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:49:30,992 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:49:30,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:49:30,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:49:30,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:49:30,995 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:49:31,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:30" (1/1) ... [2018-09-23 19:49:31,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:30" (1/1) ... [2018-09-23 19:49:31,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:30" (1/1) ... [2018-09-23 19:49:31,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:30" (1/1) ... [2018-09-23 19:49:31,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:30" (1/1) ... [2018-09-23 19:49:31,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:30" (1/1) ... [2018-09-23 19:49:31,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:30" (1/1) ... [2018-09-23 19:49:31,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:49:31,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:49:31,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:49:31,022 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:49:31,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:30" (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 [2018-09-23 19:49:31,094 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-23 19:49:31,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 19:49:31,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 19:49:31,249 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:49:31,250 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:49:31 BoogieIcfgContainer [2018-09-23 19:49:31,250 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:49:31,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:49:31,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:49:31,254 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:49:31,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:49:30" (1/2) ... [2018-09-23 19:49:31,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79646000 and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:49:31, skipping insertion in model container [2018-09-23 19:49:31,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:49:31" (2/2) ... [2018-09-23 19:49:31,257 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-09-23 19:49:31,267 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:49:31,274 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:49:31,324 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:49:31,325 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:49:31,325 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:49:31,325 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:49:31,325 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:49:31,326 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:49:31,326 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:49:31,326 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:49:31,326 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:49:31,341 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-23 19:49:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 19:49:31,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:31,348 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 19:49:31,349 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:31,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:31,356 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-09-23 19:49:31,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:31,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:31,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:31,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:31,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:31,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:31,483 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:49:31,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:49:31,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:49:31,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:49:31,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:49:31,505 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-23 19:49:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:31,576 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-09-23 19:49:31,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:49:31,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 19:49:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:31,591 INFO L225 Difference]: With dead ends: 15 [2018-09-23 19:49:31,592 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:49:31,595 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 [2018-09-23 19:49:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:49:31,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-23 19:49:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 19:49:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-23 19:49:31,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-23 19:49:31,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:31,641 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-23 19:49:31,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:49:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-23 19:49:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:49:31,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:31,643 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 19:49:31,643 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:31,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:31,644 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-09-23 19:49:31,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:31,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:31,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:31,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:31,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:31,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:31,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:31,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:31,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:31,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:31,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:49:31,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:49:31,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:49:31,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:49:31,848 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-09-23 19:49:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:31,904 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-23 19:49:31,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:49:31,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-23 19:49:31,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:31,906 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:49:31,906 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 19:49:31,908 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 [2018-09-23 19:49:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 19:49:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-09-23 19:49:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:49:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-23 19:49:31,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-23 19:49:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:31,911 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-23 19:49:31,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:49:31,911 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-23 19:49:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:49:31,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:31,912 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 19:49:31,912 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:31,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:31,913 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-09-23 19:49:31,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:31,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:31,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:31,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:31,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:31,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:31,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:31,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:31,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:32,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:32,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:49:32,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:49:32,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:49:32,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:49:32,022 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-23 19:49:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:32,070 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-09-23 19:49:32,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:49:32,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-23 19:49:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:32,071 INFO L225 Difference]: With dead ends: 12 [2018-09-23 19:49:32,071 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 19:49:32,072 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 [2018-09-23 19:49:32,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 19:49:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-09-23 19:49:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:49:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-23 19:49:32,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-23 19:49:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:32,076 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-23 19:49:32,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:49:32,076 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-23 19:49:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:49:32,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:32,077 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-23 19:49:32,078 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:32,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:32,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-09-23 19:49:32,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:32,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:32,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:32,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:32,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:32,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:32,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:32,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:32,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:32,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:32,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:32,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:32,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:49:32,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:49:32,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:49:32,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:49:32,191 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-09-23 19:49:32,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:32,260 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-23 19:49:32,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:49:32,260 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-23 19:49:32,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:32,261 INFO L225 Difference]: With dead ends: 14 [2018-09-23 19:49:32,261 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:49:32,262 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 [2018-09-23 19:49:32,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:49:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-23 19:49:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:49:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-23 19:49:32,265 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-23 19:49:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:32,266 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-23 19:49:32,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:49:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-23 19:49:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:49:32,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:32,267 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-23 19:49:32,267 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:32,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:32,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-09-23 19:49:32,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:32,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:32,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:32,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:32,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:32,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:32,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:32,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:32,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:32,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:32,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:49:32,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:49:32,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:49:32,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:49:32,427 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-23 19:49:32,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:32,585 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-23 19:49:32,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:49:32,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-23 19:49:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:32,586 INFO L225 Difference]: With dead ends: 14 [2018-09-23 19:49:32,586 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 19:49:32,587 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 [2018-09-23 19:49:32,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 19:49:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-23 19:49:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:49:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-23 19:49:32,591 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-23 19:49:32,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:32,591 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-23 19:49:32,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:49:32,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-23 19:49:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:49:32,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:32,592 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-23 19:49:32,592 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:32,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:32,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-09-23 19:49:32,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:32,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:32,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:32,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:32,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:32,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:32,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:32,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:32,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:32,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:32,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:32,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:32,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:49:32,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:49:32,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:49:32,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:49:32,763 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-23 19:49:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:32,809 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-23 19:49:32,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:49:32,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-23 19:49:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:32,812 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:49:32,812 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:49:32,813 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 [2018-09-23 19:49:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:49:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-09-23 19:49:32,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:49:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-23 19:49:32,818 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-09-23 19:49:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:32,819 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-23 19:49:32,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:49:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-23 19:49:32,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:49:32,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:32,820 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-23 19:49:32,820 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:32,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-09-23 19:49:32,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:32,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:32,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:32,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:32,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:32,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:32,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:32,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:32,886 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:32,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:32,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:32,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:32,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:49:32,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:49:32,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:49:32,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:49:32,918 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-09-23 19:49:32,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:32,962 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-09-23 19:49:32,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:49:32,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-23 19:49:32,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:32,963 INFO L225 Difference]: With dead ends: 16 [2018-09-23 19:49:32,964 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 19:49:32,964 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 [2018-09-23 19:49:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 19:49:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-09-23 19:49:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 19:49:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-23 19:49:32,968 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-23 19:49:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:32,968 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-23 19:49:32,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:49:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-23 19:49:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:49:32,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:32,969 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-23 19:49:32,970 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:32,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:32,970 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-09-23 19:49:32,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:32,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:32,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:32,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:32,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:33,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:33,114 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 [2018-09-23 19:49:33,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:33,131 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:49:33,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:33,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:33,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:33,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:49:33,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:49:33,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:49:33,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:49:33,158 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-09-23 19:49:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:33,224 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-23 19:49:33,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:49:33,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-23 19:49:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:33,225 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:49:33,226 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:49:33,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:49:33,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:49:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-23 19:49:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:49:33,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-23 19:49:33,232 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-23 19:49:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:33,233 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-23 19:49:33,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:49:33,233 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-23 19:49:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:49:33,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:33,234 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-23 19:49:33,234 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:33,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:33,234 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-09-23 19:49:33,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:33,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:33,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:33,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:33,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:33,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:33,307 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 [2018-09-23 19:49:33,316 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:33,322 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:49:33,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:33,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:33,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:33,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:49:33,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:49:33,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:49:33,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:49:33,356 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-23 19:49:33,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:33,412 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-23 19:49:33,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:49:33,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-23 19:49:33,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:33,413 INFO L225 Difference]: With dead ends: 18 [2018-09-23 19:49:33,413 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:49:33,414 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 [2018-09-23 19:49:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:49:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-23 19:49:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:49:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-23 19:49:33,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-23 19:49:33,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:33,418 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-23 19:49:33,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:49:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-23 19:49:33,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:49:33,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:33,419 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-23 19:49:33,420 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:33,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:33,420 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-09-23 19:49:33,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:33,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:33,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:33,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:33,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:33,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:33,472 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 [2018-09-23 19:49:33,481 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:33,489 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:33,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:33,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:33,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:33,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:49:33,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:49:33,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:49:33,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:49:33,515 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-23 19:49:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:33,547 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-23 19:49:33,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:49:33,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-23 19:49:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:33,548 INFO L225 Difference]: With dead ends: 19 [2018-09-23 19:49:33,548 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 19:49:33,549 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 [2018-09-23 19:49:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 19:49:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-23 19:49:33,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:49:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-23 19:49:33,555 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-23 19:49:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:33,555 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-23 19:49:33,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:49:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-23 19:49:33,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:49:33,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:33,556 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-23 19:49:33,556 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:33,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:33,557 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-09-23 19:49:33,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:33,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:33,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:33,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:33,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:33,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:33,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:33,671 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:33,730 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 19:49:33,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:33,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:33,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:33,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:49:33,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:49:33,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:49:33,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:49:33,768 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-23 19:49:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:33,972 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-23 19:49:33,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:49:33,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-23 19:49:33,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:33,973 INFO L225 Difference]: With dead ends: 18 [2018-09-23 19:49:33,973 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:49:33,974 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 [2018-09-23 19:49:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:49:33,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-23 19:49:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:49:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-23 19:49:33,978 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-23 19:49:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:33,978 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-23 19:49:33,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:49:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-23 19:49:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:49:33,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:33,979 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-23 19:49:33,979 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:33,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:33,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-09-23 19:49:33,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:33,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:33,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:33,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:33,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:34,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:34,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:34,040 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 19:49:34,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:34,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:34,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:49:34,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:49:34,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:49:34,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:49:34,068 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-23 19:49:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:34,111 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-23 19:49:34,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:49:34,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-23 19:49:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:34,113 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:49:34,113 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:49:34,114 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 [2018-09-23 19:49:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:49:34,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-09-23 19:49:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:49:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-23 19:49:34,121 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-23 19:49:34,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:34,121 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-23 19:49:34,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:49:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-23 19:49:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:49:34,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:34,122 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-23 19:49:34,123 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:34,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:34,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-09-23 19:49:34,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:34,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:34,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:34,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:34,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:34,182 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 [2018-09-23 19:49:34,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:34,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:34,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:49:34,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:49:34,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:49:34,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:49:34,225 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-23 19:49:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:34,255 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-23 19:49:34,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:49:34,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-23 19:49:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:34,257 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:49:34,257 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:49:34,258 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 [2018-09-23 19:49:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:49:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-09-23 19:49:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:49:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-23 19:49:34,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-23 19:49:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:34,263 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-23 19:49:34,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:49:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-23 19:49:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:49:34,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:34,264 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-23 19:49:34,265 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:34,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:34,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-09-23 19:49:34,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:34,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:34,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:34,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:34,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:34,324 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 [2018-09-23 19:49:34,336 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:34,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:34,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:34,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:34,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:49:34,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:49:34,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:49:34,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:49:34,367 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-23 19:49:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:34,424 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-09-23 19:49:34,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:49:34,428 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-23 19:49:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:34,428 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:49:34,428 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:49:34,429 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 [2018-09-23 19:49:34,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:49:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-09-23 19:49:34,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:49:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-23 19:49:34,435 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-23 19:49:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:34,435 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-23 19:49:34,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:49:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-23 19:49:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:49:34,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:34,436 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-23 19:49:34,436 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:34,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:34,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-09-23 19:49:34,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:34,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:34,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:34,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:34,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:34,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:34,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:34,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:49:34,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:34,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:34,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:49:34,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:49:34,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:49:34,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:49:34,708 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-23 19:49:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:34,757 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-09-23 19:49:34,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:49:34,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-23 19:49:34,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:34,758 INFO L225 Difference]: With dead ends: 20 [2018-09-23 19:49:34,759 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:49:34,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:49:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:49:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-09-23 19:49:34,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 19:49:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-23 19:49:34,764 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-23 19:49:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:34,764 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-23 19:49:34,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:49:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-23 19:49:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:34,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:34,765 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-23 19:49:34,766 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:34,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:34,766 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-09-23 19:49:34,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:34,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:34,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:34,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:34,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:34,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:34,849 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:34,875 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:34,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:34,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:34,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:34,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:34,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:34,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:34,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:34,914 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-09-23 19:49:34,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:34,992 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-23 19:49:34,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:34,992 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:34,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:34,993 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:49:34,994 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:49:34,995 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 [2018-09-23 19:49:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:49:35,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-23 19:49:35,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:49:35,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-23 19:49:35,001 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-23 19:49:35,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:35,002 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-23 19:49:35,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:35,002 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-23 19:49:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:35,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:35,003 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-23 19:49:35,003 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:35,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:35,003 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-09-23 19:49:35,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:35,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:35,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:35,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:35,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:35,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:35,081 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 [2018-09-23 19:49:35,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:35,097 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-23 19:49:35,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:35,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:35,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:35,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:35,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:35,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:35,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:35,125 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-23 19:49:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:35,172 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-23 19:49:35,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:35,173 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:35,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:35,174 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:49:35,174 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:49:35,174 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 [2018-09-23 19:49:35,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:49:35,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-23 19:49:35,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:49:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-23 19:49:35,181 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-23 19:49:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:35,182 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-23 19:49:35,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-23 19:49:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:35,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:35,183 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-23 19:49:35,183 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:35,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:35,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-09-23 19:49:35,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:35,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:35,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:35,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:35,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:35,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:35,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:35,249 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:35,267 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:35,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:35,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:35,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:35,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:35,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:35,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:35,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:35,293 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-23 19:49:35,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:35,372 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-23 19:49:35,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:35,372 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:35,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:35,373 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:49:35,373 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:49:35,373 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 [2018-09-23 19:49:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:49:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-23 19:49:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:49:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-23 19:49:35,381 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-23 19:49:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:35,381 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-23 19:49:35,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-23 19:49:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:35,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:35,382 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-23 19:49:35,382 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:35,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:35,383 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-09-23 19:49:35,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:35,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:35,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:35,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:35,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:35,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:35,500 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 [2018-09-23 19:49:35,515 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:35,523 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-23 19:49:35,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:35,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:35,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:35,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:35,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:35,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:35,566 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-23 19:49:35,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:35,786 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-23 19:49:35,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:35,787 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:35,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:35,787 INFO L225 Difference]: With dead ends: 22 [2018-09-23 19:49:35,788 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:49:35,788 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 [2018-09-23 19:49:35,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:49:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-23 19:49:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:49:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-23 19:49:35,797 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-23 19:49:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:35,797 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-23 19:49:35,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:35,797 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-23 19:49:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:35,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:35,798 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-23 19:49:35,799 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:35,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:35,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-09-23 19:49:35,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:35,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:35,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:35,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:35,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:35,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:35,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:35,960 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:35,967 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-23 19:49:35,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:35,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:35,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:35,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:35,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:35,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:35,994 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-23 19:49:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:36,079 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-23 19:49:36,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:36,080 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:36,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:36,080 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:49:36,080 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:49:36,081 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 [2018-09-23 19:49:36,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:49:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-23 19:49:36,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:49:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-23 19:49:36,089 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-23 19:49:36,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:36,089 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-23 19:49:36,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-23 19:49:36,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:36,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:36,090 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-23 19:49:36,090 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:36,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:36,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-09-23 19:49:36,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:36,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:36,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:36,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:36,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:36,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:36,147 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 [2018-09-23 19:49:36,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:36,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:36,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:36,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:36,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:36,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:36,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:36,206 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-23 19:49:36,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:36,436 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-23 19:49:36,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:36,438 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:36,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:36,438 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:49:36,439 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:49:36,439 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 [2018-09-23 19:49:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:49:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-23 19:49:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:49:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-23 19:49:36,449 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-23 19:49:36,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:36,450 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-23 19:49:36,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:36,450 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-23 19:49:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:36,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:36,454 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-23 19:49:36,454 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:36,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-09-23 19:49:36,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:36,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:36,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:36,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:36,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:36,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:36,638 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 [2018-09-23 19:49:36,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:36,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:36,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:36,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:36,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:36,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:36,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:36,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:36,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:36,706 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-23 19:49:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:36,747 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-23 19:49:36,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:36,749 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:36,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:36,750 INFO L225 Difference]: With dead ends: 23 [2018-09-23 19:49:36,750 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 19:49:36,750 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 [2018-09-23 19:49:36,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 19:49:36,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-23 19:49:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:49:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-23 19:49:36,757 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-23 19:49:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:36,757 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-23 19:49:36,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-23 19:49:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:36,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:36,758 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-23 19:49:36,759 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:36,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:36,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-09-23 19:49:36,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:36,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:36,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:36,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:36,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:36,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:36,800 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 [2018-09-23 19:49:36,808 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:36,814 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-23 19:49:36,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:36,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:36,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:36,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:36,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:36,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:36,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:36,838 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-23 19:49:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:37,034 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-23 19:49:37,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:37,035 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:37,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:37,035 INFO L225 Difference]: With dead ends: 22 [2018-09-23 19:49:37,035 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 19:49:37,036 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 [2018-09-23 19:49:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 19:49:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-23 19:49:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:49:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-23 19:49:37,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-23 19:49:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:37,043 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-23 19:49:37,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:37,043 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-23 19:49:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:37,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:37,044 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-23 19:49:37,044 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:37,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:37,044 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-09-23 19:49:37,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:37,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:37,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:37,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:37,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:37,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:37,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:37,504 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:37,529 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:37,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:37,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:37,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:37,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:37,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:37,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:37,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:37,565 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-23 19:49:37,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:37,627 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-23 19:49:37,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:37,627 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:37,627 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:49:37,627 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:49:37,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:49:37,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-23 19:49:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:49:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:49:37,637 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-23 19:49:37,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:37,637 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:49:37,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:49:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:37,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:37,638 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-23 19:49:37,638 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:37,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:37,638 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-09-23 19:49:37,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:37,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:37,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:37,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:37,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:37,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:37,731 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 [2018-09-23 19:49:37,738 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:37,748 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-23 19:49:37,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:37,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:37,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:37,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:37,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:37,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:37,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:37,776 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-23 19:49:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:37,893 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-23 19:49:37,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:37,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:37,894 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:49:37,894 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:49:37,894 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 [2018-09-23 19:49:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:49:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-09-23 19:49:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:49:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-23 19:49:37,903 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-23 19:49:37,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:37,903 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-23 19:49:37,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-23 19:49:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:37,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:37,904 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-23 19:49:37,905 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:37,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:37,905 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-09-23 19:49:37,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:37,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:37,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:37,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:37,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:37,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:37,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:37,968 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:37,980 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-23 19:49:37,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:37,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:38,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:38,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:38,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:38,006 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-23 19:49:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:38,061 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-23 19:49:38,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:38,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:38,061 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:49:38,062 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:49:38,062 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 [2018-09-23 19:49:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:49:38,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-23 19:49:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:49:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:49:38,072 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-23 19:49:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:38,073 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:49:38,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:49:38,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:38,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:38,074 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-23 19:49:38,074 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:38,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:38,074 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-09-23 19:49:38,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:38,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:38,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:38,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:38,114 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 [2018-09-23 19:49:38,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:38,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:38,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:38,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:38,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:38,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:38,160 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-23 19:49:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:38,262 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-23 19:49:38,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:38,262 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:38,262 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:49:38,262 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:49:38,263 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 [2018-09-23 19:49:38,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:49:38,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-09-23 19:49:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:49:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-23 19:49:38,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-23 19:49:38,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:38,270 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-23 19:49:38,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-23 19:49:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:38,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:38,271 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-23 19:49:38,271 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:38,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:38,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-09-23 19:49:38,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:38,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:38,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:38,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:38,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:38,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:38,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:38,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:38,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:38,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:38,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:38,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:38,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:38,400 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-23 19:49:38,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:38,439 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-23 19:49:38,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:38,439 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:38,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:38,440 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:49:38,440 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:49:38,441 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 [2018-09-23 19:49:38,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:49:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-09-23 19:49:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:49:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:49:38,453 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-23 19:49:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:38,453 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:49:38,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:49:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:38,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:38,454 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-23 19:49:38,455 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:38,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-09-23 19:49:38,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:38,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:38,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:38,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:38,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:38,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:38,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-23 19:49:38,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:38,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:38,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:38,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:38,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:38,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:38,552 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-23 19:49:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:38,658 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-23 19:49:38,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:38,658 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:38,658 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:49:38,658 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:49:38,659 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 [2018-09-23 19:49:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:49:38,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-09-23 19:49:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:49:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-23 19:49:38,667 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-23 19:49:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:38,667 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-23 19:49:38,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-23 19:49:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:38,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:38,668 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-23 19:49:38,668 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:38,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:38,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-09-23 19:49:38,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:38,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:38,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:38,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:38,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:38,740 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:38,745 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:38,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:38,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:38,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:38,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:38,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:38,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:38,773 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-23 19:49:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:38,827 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-23 19:49:38,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:38,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:38,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:38,827 INFO L225 Difference]: With dead ends: 25 [2018-09-23 19:49:38,827 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:49:38,828 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 [2018-09-23 19:49:38,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:49:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-09-23 19:49:38,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:49:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:49:38,835 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-23 19:49:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:38,836 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:49:38,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:49:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 19:49:38,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:38,837 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-23 19:49:38,837 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:38,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-09-23 19:49:38,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:38,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:38,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:38,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:38,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:38,917 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:38,921 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:38,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:38,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:38,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:38,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:49:38,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:49:38,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:49:38,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:49:38,950 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-23 19:49:38,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:38,987 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-09-23 19:49:38,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:49:38,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-23 19:49:38,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:38,987 INFO L225 Difference]: With dead ends: 24 [2018-09-23 19:49:38,988 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 19:49:38,988 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 [2018-09-23 19:49:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 19:49:38,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-09-23 19:49:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:49:38,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-23 19:49:38,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-23 19:49:38,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:38,997 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-23 19:49:38,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:49:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-23 19:49:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:38,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:38,998 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-23 19:49:38,998 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:38,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:38,998 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-09-23 19:49:38,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:38,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:38,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:38,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:39,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:39,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:39,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:39,085 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:39,096 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:49:39,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:39,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:39,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:39,122 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:39,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:39,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:39,123 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-09-23 19:49:39,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:39,194 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-23 19:49:39,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:39,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:39,195 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:49:39,195 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:49:39,195 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 [2018-09-23 19:49:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:49:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-23 19:49:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:39,206 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-23 19:49:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:39,207 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:39,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:39,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:39,207 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-23 19:49:39,208 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:39,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:39,208 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-09-23 19:49:39,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:39,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:39,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:39,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:39,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:39,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:39,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:39,476 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:39,484 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:49:39,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:39,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:39,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:39,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:39,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:39,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:39,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:39,514 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-23 19:49:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:39,554 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-23 19:49:39,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:39,554 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:39,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:39,555 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:49:39,555 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:49:39,555 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 [2018-09-23 19:49:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:49:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-23 19:49:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:49:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:49:39,568 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-23 19:49:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:39,568 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:49:39,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:49:39,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:39,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:39,569 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-23 19:49:39,569 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:39,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:39,569 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-09-23 19:49:39,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:39,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:39,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:39,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:39,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:39,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:39,638 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 [2018-09-23 19:49:39,646 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:39,652 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-23 19:49:39,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:39,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:39,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:39,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:39,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:39,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:39,681 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-23 19:49:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:39,727 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-23 19:49:39,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:39,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:39,728 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:49:39,729 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:49:39,729 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 [2018-09-23 19:49:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:49:39,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-23 19:49:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:39,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-23 19:49:39,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:39,741 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:39,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:39,741 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:39,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:39,742 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:39,742 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:39,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:39,742 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-09-23 19:49:39,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:39,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:39,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:39,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:39,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:39,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:39,801 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 [2018-09-23 19:49:39,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:39,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:39,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:39,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:39,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:39,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:39,870 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-23 19:49:39,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:39,936 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-23 19:49:39,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:39,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:39,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:39,937 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:49:39,937 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:49:39,937 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 [2018-09-23 19:49:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:49:39,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-23 19:49:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:49:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-23 19:49:39,949 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-23 19:49:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:39,949 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-23 19:49:39,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-23 19:49:39,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:39,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:39,950 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-23 19:49:39,950 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:39,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:39,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-09-23 19:49:39,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:39,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:39,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:39,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:39,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:40,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:40,113 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 [2018-09-23 19:49:40,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:40,126 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:40,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:40,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:40,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:40,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:40,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:40,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:40,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:40,152 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-23 19:49:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:40,200 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-23 19:49:40,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:40,200 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:40,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:40,201 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:49:40,201 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:49:40,201 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 [2018-09-23 19:49:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:49:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-23 19:49:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:40,213 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-23 19:49:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:40,213 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:40,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:40,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:40,214 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:40,214 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:40,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:40,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-09-23 19:49:40,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:40,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:40,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:40,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:40,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:40,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:40,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:40,281 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:40,291 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:49:40,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:40,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:40,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:40,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:40,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:40,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:40,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:40,316 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-23 19:49:40,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:40,358 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-23 19:49:40,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:40,358 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:40,359 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:49:40,359 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:49:40,359 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 [2018-09-23 19:49:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:49:40,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-23 19:49:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:49:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:49:40,370 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-23 19:49:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:40,370 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:49:40,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:49:40,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:40,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:40,371 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:40,371 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:40,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:40,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-09-23 19:49:40,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:40,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:40,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:40,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:40,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:40,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:40,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:40,440 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:40,450 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:40,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:40,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:40,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:40,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:40,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:40,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:40,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:40,479 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-23 19:49:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:40,579 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-23 19:49:40,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:40,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:40,581 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:49:40,581 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:49:40,581 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 [2018-09-23 19:49:40,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:49:40,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-23 19:49:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:40,595 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-23 19:49:40,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:40,595 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:40,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:40,596 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:40,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:40,596 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:40,596 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:40,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:40,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-09-23 19:49:40,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:40,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:40,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:40,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:40,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:40,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:40,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:40,682 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:40,687 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:49:40,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:40,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:40,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:40,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:40,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:40,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:40,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:40,717 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-23 19:49:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:40,772 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-23 19:49:40,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:40,772 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:40,773 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:49:40,773 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:49:40,773 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 [2018-09-23 19:49:40,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:49:40,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-23 19:49:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:49:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-23 19:49:40,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-23 19:49:40,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:40,782 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-23 19:49:40,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:40,782 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-23 19:49:40,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:40,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:40,783 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-23 19:49:40,783 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:40,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:40,783 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-09-23 19:49:40,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:40,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:40,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:40,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:40,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:40,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:40,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:40,965 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:40,972 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-23 19:49:40,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:40,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:40,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:41,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:41,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:41,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:41,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:41,001 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-23 19:49:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:41,057 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-23 19:49:41,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:41,057 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:41,058 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:49:41,058 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:49:41,058 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 [2018-09-23 19:49:41,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:49:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-23 19:49:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:41,073 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-23 19:49:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:41,073 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:41,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:41,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:41,073 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:41,074 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:41,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:41,074 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-09-23 19:49:41,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:41,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:41,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:41,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:41,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:41,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:41,231 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 [2018-09-23 19:49:41,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:41,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:41,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:41,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:41,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:41,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:41,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:41,274 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-23 19:49:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:41,320 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-23 19:49:41,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:41,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:41,321 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:49:41,321 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:49:41,321 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 [2018-09-23 19:49:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:49:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-23 19:49:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:49:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:49:41,336 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-23 19:49:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:41,336 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:49:41,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:49:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:41,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:41,336 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:41,337 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:41,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-09-23 19:49:41,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:41,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:41,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:41,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:41,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:41,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:41,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:41,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:41,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:41,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:41,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:41,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:41,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:41,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:41,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:41,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:41,444 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-23 19:49:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:41,490 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-23 19:49:41,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:41,490 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:41,491 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:49:41,491 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:49:41,491 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 [2018-09-23 19:49:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:49:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-23 19:49:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:41,517 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-23 19:49:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:41,517 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:41,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:41,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:41,517 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:41,518 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:41,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:41,518 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-09-23 19:49:41,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:41,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:41,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:41,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:41,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:41,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:41,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:41,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:41,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:49:41,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:41,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:41,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:41,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:41,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:41,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:41,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:41,609 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-23 19:49:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:41,695 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-23 19:49:41,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:41,695 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:41,696 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:49:41,696 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:49:41,696 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 [2018-09-23 19:49:41,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:49:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-23 19:49:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:49:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-23 19:49:41,712 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-23 19:49:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:41,712 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-23 19:49:41,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-23 19:49:41,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:41,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:41,713 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:41,713 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:41,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:41,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-09-23 19:49:41,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:41,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:41,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:41,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:41,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:41,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:41,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:41,884 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:41,889 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:41,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:41,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:41,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:41,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:41,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:41,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:41,914 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-23 19:49:41,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:41,952 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-23 19:49:41,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:41,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:41,953 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:49:41,953 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:49:41,953 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 [2018-09-23 19:49:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:49:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-23 19:49:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:41,969 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-23 19:49:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:41,969 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:41,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:41,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:41,969 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:41,970 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:41,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:41,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-09-23 19:49:41,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:41,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:41,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:41,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:41,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:42,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:42,035 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 [2018-09-23 19:49:42,043 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:42,052 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:49:42,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:42,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:42,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:42,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:42,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:42,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:42,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:42,077 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-23 19:49:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:42,121 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-23 19:49:42,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:42,122 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:42,122 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:49:42,122 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:49:42,122 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 [2018-09-23 19:49:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:49:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-23 19:49:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:49:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:49:42,135 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-23 19:49:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:42,135 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:49:42,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:49:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:42,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:42,136 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:42,136 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:42,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:42,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-09-23 19:49:42,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:42,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:42,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:42,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:42,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:42,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:42,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:42,193 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:42,199 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-23 19:49:42,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:42,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:42,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:42,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:42,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:42,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:42,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:42,233 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-23 19:49:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:42,322 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-23 19:49:42,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:42,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:42,324 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:49:42,324 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 19:49:42,324 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 [2018-09-23 19:49:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 19:49:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-23 19:49:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:42,339 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-23 19:49:42,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:42,339 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:42,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:42,340 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:42,340 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:42,340 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-23 19:49:42,340 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:42,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:42,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-09-23 19:49:42,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:42,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:42,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:42,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:42,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:42,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:42,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:42,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:42,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:42,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:42,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:42,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:42,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:42,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:42,430 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-23 19:49:42,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:42,466 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-23 19:49:42,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:42,466 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:42,466 INFO L225 Difference]: With dead ends: 26 [2018-09-23 19:49:42,466 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 19:49:42,467 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 [2018-09-23 19:49:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 19:49:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-23 19:49:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:49:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-23 19:49:42,477 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-23 19:49:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:42,478 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-23 19:49:42,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:42,478 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-23 19:49:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:42,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:42,478 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-23 19:49:42,478 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:42,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:42,479 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-09-23 19:49:42,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:42,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:42,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:42,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:42,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:42,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:42,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:42,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:42,544 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:42,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:42,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:42,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:42,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:42,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:42,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:42,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:42,570 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-23 19:49:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:42,670 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:49:42,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:42,670 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:42,671 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:49:42,671 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:49:42,671 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 [2018-09-23 19:49:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:49:42,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-23 19:49:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:42,693 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-23 19:49:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:42,693 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:42,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:42,693 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:42,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:42,693 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:42,694 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:42,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:42,694 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-09-23 19:49:42,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:42,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:42,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:42,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:42,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:43,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:43,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:43,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:43,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:49:43,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:43,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:43,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:43,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:43,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:43,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:43,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:43,228 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-23 19:49:43,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:43,403 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:49:43,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:43,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:43,403 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:49:43,403 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:49:43,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:43,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:49:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-23 19:49:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:43,419 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-23 19:49:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:43,420 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:43,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:43,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:43,420 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:43,420 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:43,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:43,420 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-09-23 19:49:43,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:43,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:43,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:43,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:43,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:43,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:43,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:43,475 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:43,479 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:43,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:43,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:43,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:43,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:43,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:43,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:43,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:43,504 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-23 19:49:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:43,555 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:49:43,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:43,555 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:43,556 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:49:43,556 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:49:43,556 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 [2018-09-23 19:49:43,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:49:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-23 19:49:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:43,575 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-23 19:49:43,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:43,575 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:43,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:43,575 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:43,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:43,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:43,575 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:43,575 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:43,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:43,576 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-09-23 19:49:43,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:43,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:43,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:43,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:43,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:43,633 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:43,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:43,642 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:43,648 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:49:43,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:43,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:43,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:43,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:43,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:43,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:43,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:43,672 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-23 19:49:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:43,724 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-23 19:49:43,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:43,724 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:43,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:43,725 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:49:43,725 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:49:43,725 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 [2018-09-23 19:49:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:49:43,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-09-23 19:49:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:49:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:49:43,740 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-23 19:49:43,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:43,740 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:49:43,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:49:43,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:43,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:43,741 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:43,741 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:43,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-09-23 19:49:43,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:43,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:43,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:43,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:43,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:43,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:43,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:43,860 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:43,866 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-23 19:49:43,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:43,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:43,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:43,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:43,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:43,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:43,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:43,889 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-23 19:49:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:44,048 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:49:44,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:44,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:44,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:44,048 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:49:44,048 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:49:44,049 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 [2018-09-23 19:49:44,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:49:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-23 19:49:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:44,069 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-23 19:49:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:44,069 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:44,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:44,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:44,069 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:44,069 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:44,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:44,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-09-23 19:49:44,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:44,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:44,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:44,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:44,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:44,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:44,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:44,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:44,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:44,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:44,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:44,162 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-23 19:49:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:44,222 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:49:44,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:44,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:44,223 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:49:44,223 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:49:44,223 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 [2018-09-23 19:49:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:49:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-23 19:49:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:44,244 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-23 19:49:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:44,244 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:44,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:44,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:44,245 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:44,245 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:44,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:44,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-09-23 19:49:44,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:44,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:44,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:44,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:44,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:44,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:44,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:44,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:44,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:44,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:44,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:44,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:44,339 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-23 19:49:44,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:44,422 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:49:44,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:44,422 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:44,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:44,423 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:49:44,423 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:49:44,423 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 [2018-09-23 19:49:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:49:44,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-23 19:49:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:44,445 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-23 19:49:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:44,445 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:44,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:44,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:44,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:44,446 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-23 19:49:44,446 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:44,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:44,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-09-23 19:49:44,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:44,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:44,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:44,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:44,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:44,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:44,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:49:44,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:44,515 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:44,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:44,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:44,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:44,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:44,540 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-23 19:49:44,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:44,614 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-23 19:49:44,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:44,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:44,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:44,614 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:49:44,614 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:49:44,615 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 [2018-09-23 19:49:44,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:49:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-09-23 19:49:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:49:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-23 19:49:44,630 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-23 19:49:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:44,630 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-23 19:49:44,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-23 19:49:44,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:44,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:44,631 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:44,631 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:44,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:44,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-09-23 19:49:44,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:44,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:44,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:44,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:44,706 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 [2018-09-23 19:49:44,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:44,718 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:44,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:44,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:44,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:44,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:44,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:44,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:44,743 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-23 19:49:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:44,801 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-23 19:49:44,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:44,801 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:44,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:44,802 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:49:44,802 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:49:44,802 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 [2018-09-23 19:49:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:49:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-23 19:49:44,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:44,828 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-23 19:49:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:44,828 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:44,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:44,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:44,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:44,828 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:44,829 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:44,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:44,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-09-23 19:49:44,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:44,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:44,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:44,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:44,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:44,891 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:44,896 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:49:44,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:44,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:44,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:44,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:44,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:44,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:44,926 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-23 19:49:44,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:44,992 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-23 19:49:44,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:44,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:44,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:44,992 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:49:44,992 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:49:44,993 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 [2018-09-23 19:49:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:49:45,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-23 19:49:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:45,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:45,019 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-23 19:49:45,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:45,020 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:45,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:45,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:45,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:45,020 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:45,021 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:45,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:45,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-09-23 19:49:45,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:45,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:45,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:45,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:45,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:45,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:45,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:45,119 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:45,126 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-23 19:49:45,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:45,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:45,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:45,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:45,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:45,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:45,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:45,150 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-23 19:49:45,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:45,220 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-23 19:49:45,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:45,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:45,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:45,221 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:49:45,221 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:49:45,221 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 [2018-09-23 19:49:45,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:49:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-23 19:49:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:45,245 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-23 19:49:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:45,246 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:45,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:45,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:45,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:45,246 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-23 19:49:45,246 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:45,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:45,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-09-23 19:49:45,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:45,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:45,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:45,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:45,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:45,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:45,309 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 [2018-09-23 19:49:45,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:45,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:45,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:45,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:45,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:45,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:45,357 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-23 19:49:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:45,471 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-23 19:49:45,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:45,471 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:45,471 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:49:45,471 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:49:45,472 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 [2018-09-23 19:49:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:49:45,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-09-23 19:49:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:49:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:49:45,493 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-23 19:49:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:45,494 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:49:45,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:49:45,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:45,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:45,494 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-23 19:49:45,495 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:45,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:45,495 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-09-23 19:49:45,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:45,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:45,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:45,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:45,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:45,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:45,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:45,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:45,552 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:45,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:45,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:45,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:45,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:45,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:45,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:45,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:45,578 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-23 19:49:45,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:45,644 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-23 19:49:45,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:45,644 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:45,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:45,644 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:49:45,645 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:49:45,645 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 [2018-09-23 19:49:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:49:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-09-23 19:49:45,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:45,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-23 19:49:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:45,669 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:45,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:45,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:45,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:45,669 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-23 19:49:45,669 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:45,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:45,670 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-09-23 19:49:45,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:45,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:45,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:45,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:45,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:45,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:45,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:45,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:45,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:49:45,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:45,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:45,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:45,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:45,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:45,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:45,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:45,758 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-23 19:49:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:45,831 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-23 19:49:45,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:45,831 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:45,831 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:49:45,831 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:49:45,832 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 [2018-09-23 19:49:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:49:45,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-23 19:49:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:45,860 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-23 19:49:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:45,860 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:45,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:45,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:45,860 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-23 19:49:45,861 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:45,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:45,861 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-09-23 19:49:45,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:45,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:45,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:45,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:45,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:45,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:45,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:45,999 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:46,011 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:46,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:46,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:46,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:46,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:46,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:46,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:46,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:46,033 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-23 19:49:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:46,129 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-23 19:49:46,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:46,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:46,129 INFO L225 Difference]: With dead ends: 29 [2018-09-23 19:49:46,129 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:49:46,130 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 [2018-09-23 19:49:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:49:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-23 19:49:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:46,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:46,152 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-23 19:49:46,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:46,152 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:46,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:46,152 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:49:46,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:46,152 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-23 19:49:46,152 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:46,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:46,153 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-09-23 19:49:46,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:46,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:46,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:46,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:46,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:46,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:46,231 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 [2018-09-23 19:49:46,238 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:46,244 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:49:46,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:46,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:46,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:46,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:49:46,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:49:46,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:49:46,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:49:46,268 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-23 19:49:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:46,323 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-09-23 19:49:46,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:49:46,323 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-23 19:49:46,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:46,324 INFO L225 Difference]: With dead ends: 28 [2018-09-23 19:49:46,324 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 19:49:46,324 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 [2018-09-23 19:49:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 19:49:46,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-09-23 19:49:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:49:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-23 19:49:46,341 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-23 19:49:46,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:46,342 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-23 19:49:46,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:49:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-23 19:49:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:46,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:46,342 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-23 19:49:46,342 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:46,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:46,342 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-09-23 19:49:46,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:46,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:46,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:46,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:46,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:46,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:46,398 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 [2018-09-23 19:49:46,410 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:46,417 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:49:46,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:46,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:46,444 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:46,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:46,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:46,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:46,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:46,445 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-09-23 19:49:46,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:46,533 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:49:46,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:46,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:46,534 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:49:46,534 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:49:46,535 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 [2018-09-23 19:49:46,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:49:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-23 19:49:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:46,565 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:46,566 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:46,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:46,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:46,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:46,566 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-23 19:49:46,567 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:46,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:46,567 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-09-23 19:49:46,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:46,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:46,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:46,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:46,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:46,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:46,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:46,651 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:46,660 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:49:46,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:46,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:46,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:46,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:46,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:46,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:46,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:46,689 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:46,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:46,782 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:49:46,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:46,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:46,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:46,783 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:49:46,783 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:49:46,783 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 [2018-09-23 19:49:46,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:49:46,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-23 19:49:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:46,811 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-23 19:49:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:46,811 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:46,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:46,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:46,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:46,812 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-23 19:49:46,812 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:46,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:46,812 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-09-23 19:49:46,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:46,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:46,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:46,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:46,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:46,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:46,868 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 [2018-09-23 19:49:46,877 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:46,885 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:49:46,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:46,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:46,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:46,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:46,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:46,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:46,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:46,910 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-23 19:49:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:47,009 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:49:47,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:47,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:47,009 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:49:47,009 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:49:47,010 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 [2018-09-23 19:49:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:49:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-23 19:49:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:47,041 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:47,041 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:47,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:47,041 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:47,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:47,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:47,041 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:47,042 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:47,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:47,042 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-09-23 19:49:47,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:47,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:47,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:47,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:47,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:47,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:47,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:47,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:47,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:47,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:47,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:47,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:47,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:47,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:47,130 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:47,250 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:49:47,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:47,251 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:47,251 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:49:47,251 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:49:47,251 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 [2018-09-23 19:49:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:49:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-23 19:49:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:47,279 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-23 19:49:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:47,279 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:47,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:47,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:47,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:47,279 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-23 19:49:47,280 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:47,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:47,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-09-23 19:49:47,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:47,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:47,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:47,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:47,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:47,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:47,345 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 [2018-09-23 19:49:47,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:47,359 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:47,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:47,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:47,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:47,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:47,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:47,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:47,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:47,382 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-23 19:49:47,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:47,472 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:49:47,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:47,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:47,473 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:49:47,473 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:49:47,473 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 [2018-09-23 19:49:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:49:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-23 19:49:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:47,509 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:47,510 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:47,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:47,510 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:47,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:47,510 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:47,510 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:47,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:47,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-09-23 19:49:47,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:47,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:47,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:47,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:47,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:47,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:47,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:47,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:47,579 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-23 19:49:47,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:47,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:47,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:47,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:47,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:47,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:47,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:47,603 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:47,694 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:49:47,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:47,694 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:47,695 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:49:47,695 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:49:47,696 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 [2018-09-23 19:49:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:49:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-23 19:49:47,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:47,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:47,726 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-23 19:49:47,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:47,726 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:47,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:47,727 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:47,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:47,727 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:47,727 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:47,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:47,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-09-23 19:49:47,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:47,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:47,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:47,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:47,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:47,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:47,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:47,788 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:47,817 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:47,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:47,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:47,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:47,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:47,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:47,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:47,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:47,849 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-23 19:49:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:47,954 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:49:47,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:47,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:47,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:47,955 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:49:47,955 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:49:47,955 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 [2018-09-23 19:49:47,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:49:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-23 19:49:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:47,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:47,988 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:47,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:47,988 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:47,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:47,988 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:47,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:47,989 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:47,989 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:47,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:47,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-09-23 19:49:47,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:47,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:47,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:47,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:47,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:48,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:48,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:48,749 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:48,760 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:49:48,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:48,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:48,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:48,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:48,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:48,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:48,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:48,785 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:48,860 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:49:48,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:48,860 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:48,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:48,861 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:49:48,861 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:49:48,861 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 [2018-09-23 19:49:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:49:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-23 19:49:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:49:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:49:48,888 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-23 19:49:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:48,889 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:49:48,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:49:48,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:48,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:48,889 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-23 19:49:48,889 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:48,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:48,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-09-23 19:49:48,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:48,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:48,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:48,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:48,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:48,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:48,943 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 [2018-09-23 19:49:48,949 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:48,958 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:49:48,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:48,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:48,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:48,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:48,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:48,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:48,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:48,985 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-23 19:49:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:49,071 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:49:49,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:49,071 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:49,072 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:49:49,072 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:49:49,072 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 [2018-09-23 19:49:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:49:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-23 19:49:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:49,107 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:49,107 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:49,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:49,107 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:49,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:49,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:49,107 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:49,107 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:49,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-09-23 19:49:49,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:49,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:49,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:49,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:49,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:49,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:49,169 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 [2018-09-23 19:49:49,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:49,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:49,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:49,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:49,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:49,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:49,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:49,216 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:49,305 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-23 19:49:49,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:49,305 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:49,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:49,306 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:49:49,306 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:49:49,306 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 [2018-09-23 19:49:49,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:49:49,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-23 19:49:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:49,338 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-23 19:49:49,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:49,338 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:49,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:49,338 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:49,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:49,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:49,339 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:49,339 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:49,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-09-23 19:49:49,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:49,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:49,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:49,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:49,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:49,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:49,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:49,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:49,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:49,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:49,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:49,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:49,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:49,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:49,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:49,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:49,498 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-23 19:49:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:49,580 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:49:49,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:49,580 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:49,581 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:49:49,581 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:49:49,582 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 [2018-09-23 19:49:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:49:49,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-23 19:49:49,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:49,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:49,616 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:49,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:49,616 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:49,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:49,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:49,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:49,616 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:49,616 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:49,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:49,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-09-23 19:49:49,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:49,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:49,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:49,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:49,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:49,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:49,675 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 [2018-09-23 19:49:49,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:49,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-23 19:49:49,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:49,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:49,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:49,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:49,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:49,718 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:49,803 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-23 19:49:49,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:49,803 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:49,803 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:49:49,803 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:49:49,804 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 [2018-09-23 19:49:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:49:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-23 19:49:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:49,834 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-23 19:49:49,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:49,834 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:49,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:49,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:49,835 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:49,835 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:49,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:49,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-09-23 19:49:49,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:49,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:49,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:49,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:49,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:50,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:50,101 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 [2018-09-23 19:49:50,108 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:50,114 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:50,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:50,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:50,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:50,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:50,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:50,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:50,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:50,139 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-23 19:49:50,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:50,216 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-23 19:49:50,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:50,216 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:50,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:50,217 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:49:50,217 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:49:50,217 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 [2018-09-23 19:49:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:49:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-23 19:49:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:50,253 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:50,253 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:50,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:50,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:50,254 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:50,254 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:50,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:50,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-09-23 19:49:50,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:50,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:50,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:50,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:50,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:50,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:50,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:50,380 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:50,389 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:49:50,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:50,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:50,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:50,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:50,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:50,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:50,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:50,413 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:50,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:50,510 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-23 19:49:50,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:50,510 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:50,510 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:49:50,510 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:49:50,511 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 [2018-09-23 19:49:50,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:49:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-23 19:49:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:50,541 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-23 19:49:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:50,541 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:50,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:50,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:50,542 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:50,542 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:50,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-09-23 19:49:50,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:50,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:50,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:50,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:50,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:50,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:50,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:50,796 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:50,803 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:49:50,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:50,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:50,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:50,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:50,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:50,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:50,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:50,828 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-23 19:49:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:50,888 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-23 19:49:50,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:50,888 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:50,889 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:49:50,889 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:49:50,889 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 [2018-09-23 19:49:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:49:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-23 19:49:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:50,924 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:50,924 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:50,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:50,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:50,924 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:50,925 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:50,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:50,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-09-23 19:49:50,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:50,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:50,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:50,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:50,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:51,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:51,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:51,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:51,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:51,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:51,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:51,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:51,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:51,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:51,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:51,063 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:51,137 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-23 19:49:51,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:51,137 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:51,138 INFO L225 Difference]: With dead ends: 30 [2018-09-23 19:49:51,138 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:49:51,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:49:51,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-23 19:49:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:49:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-23 19:49:51,161 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-23 19:49:51,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:51,162 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-23 19:49:51,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-23 19:49:51,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:51,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:51,162 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-23 19:49:51,162 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:51,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:51,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-09-23 19:49:51,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:51,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:51,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:51,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:51,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:51,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:51,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:51,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:51,272 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:51,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:51,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:51,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:51,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:51,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:51,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:51,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:51,296 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-23 19:49:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:51,399 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:49:51,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:51,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:51,399 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:49:51,399 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:49:51,400 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 [2018-09-23 19:49:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:49:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-23 19:49:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:51,439 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:51,439 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:51,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:51,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:51,440 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:51,440 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:51,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-09-23 19:49:51,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:51,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:51,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:51,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:51,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:51,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:51,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:51,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:51,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-23 19:49:51,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:51,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:51,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:51,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:51,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:51,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:51,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:51,536 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:51,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:51,650 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:49:51,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:51,650 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:51,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:51,651 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:49:51,651 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:49:51,651 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 [2018-09-23 19:49:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:49:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-23 19:49:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:51,691 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-23 19:49:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:51,691 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:51,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:51,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:51,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:51,692 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:51,692 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:51,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:51,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-09-23 19:49:51,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:51,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:51,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:51,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:51,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:51,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:51,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:51,753 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:51,758 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:51,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:51,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:51,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:51,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:51,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:51,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:51,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:51,783 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-23 19:49:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:51,883 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:49:51,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:51,883 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:51,884 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:49:51,884 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:49:51,884 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 [2018-09-23 19:49:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:49:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-23 19:49:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:51,926 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:51,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:51,926 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:51,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:51,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:51,926 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:51,927 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:51,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:51,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-09-23 19:49:51,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:51,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:51,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:51,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:51,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:51,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:51,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:51,998 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:52,009 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:49:52,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:52,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:52,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:52,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:52,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:52,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:52,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:52,035 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:52,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:52,153 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:49:52,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:52,153 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:52,153 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:49:52,153 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:49:52,154 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 [2018-09-23 19:49:52,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:49:52,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-23 19:49:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:52,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:52,188 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-23 19:49:52,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:52,188 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:52,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:52,188 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:52,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:52,188 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:52,189 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:52,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:52,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-09-23 19:49:52,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:52,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:52,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:52,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:52,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:52,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:52,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:52,273 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:52,281 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:49:52,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:52,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:52,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:52,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:52,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:52,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:52,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:52,305 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-23 19:49:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:52,446 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:49:52,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:52,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:52,447 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:49:52,447 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:49:52,447 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 [2018-09-23 19:49:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:49:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-23 19:49:52,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:52,490 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:52,491 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:52,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:52,491 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:52,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:52,491 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:52,491 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:52,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:52,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-09-23 19:49:52,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:52,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:52,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:52,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:52,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:52,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:52,587 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 [2018-09-23 19:49:52,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:52,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:52,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:52,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:52,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:52,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:52,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:52,625 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:52,731 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:49:52,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:52,731 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:52,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:52,732 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:49:52,732 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:49:52,732 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 [2018-09-23 19:49:52,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:49:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-23 19:49:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:52,774 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-23 19:49:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:52,774 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:52,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:52,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:52,775 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:52,775 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:52,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:52,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-09-23 19:49:52,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:52,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:52,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:52,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:52,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:52,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:52,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:52,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:52,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:52,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:52,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:52,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:52,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:52,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:52,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:52,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:52,908 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-23 19:49:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:53,008 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:49:53,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:53,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:53,009 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:49:53,009 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:49:53,010 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 [2018-09-23 19:49:53,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:49:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-23 19:49:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:53,051 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:53,051 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:53,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:53,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:53,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:53,052 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:53,052 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:53,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:53,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-09-23 19:49:53,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:53,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:53,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:53,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:53,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:53,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:53,113 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 [2018-09-23 19:49:53,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:53,128 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-23 19:49:53,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:53,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:53,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:53,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:53,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:53,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:53,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:53,152 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:53,254 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:49:53,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:53,254 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:53,254 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:49:53,254 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:49:53,255 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 [2018-09-23 19:49:53,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:49:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-23 19:49:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:49:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:49:53,286 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-23 19:49:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:53,286 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:49:53,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:53,286 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:49:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:53,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:53,287 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:53,287 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:53,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:53,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-09-23 19:49:53,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:53,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:53,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:53,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:53,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:53,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:53,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:53,344 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:53,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:53,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:53,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:53,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:53,373 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:53,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:53,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:53,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:53,374 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-23 19:49:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:53,468 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:49:53,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:53,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:53,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:53,469 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:49:53,469 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:49:53,470 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 [2018-09-23 19:49:53,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:49:53,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-23 19:49:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:53,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:53,514 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:53,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:53,515 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:53,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:53,515 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:53,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:53,515 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:53,515 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:53,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:53,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-09-23 19:49:53,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:53,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:53,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:53,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:53,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:53,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:53,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:53,575 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 [2018-09-23 19:49:53,583 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:53,592 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:49:53,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:53,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:53,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:53,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:53,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:53,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:53,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:53,615 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:53,717 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-23 19:49:53,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:53,717 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:53,718 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:49:53,718 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:49:53,718 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 [2018-09-23 19:49:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:49:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-23 19:49:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:53,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-23 19:49:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:53,759 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:53,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:53,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:53,760 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:53,760 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:53,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:53,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-09-23 19:49:53,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:53,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:53,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:53,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:53,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:53,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:53,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:53,840 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:53,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:49:53,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:53,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:53,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:53,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:53,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:53,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:53,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:53,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:53,871 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-23 19:49:53,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:53,976 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:49:53,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:53,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:53,977 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:49:53,977 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:49:53,978 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 [2018-09-23 19:49:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:49:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-23 19:49:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:54,025 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:54,025 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:54,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:54,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:54,025 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:54,025 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:54,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:54,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-09-23 19:49:54,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:54,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:54,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:54,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:54,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:54,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:54,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:54,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:54,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:54,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:54,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:54,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:54,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:54,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:54,122 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:54,239 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-23 19:49:54,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:54,239 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:54,239 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:49:54,239 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:49:54,240 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 [2018-09-23 19:49:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:49:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-23 19:49:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:54,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:54,277 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-23 19:49:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:54,278 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:54,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:54,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:54,278 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:54,278 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:54,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:54,279 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-09-23 19:49:54,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:54,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:54,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:54,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:54,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:54,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:54,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:54,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:54,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:54,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:54,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:54,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:54,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:54,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:54,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:54,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:54,494 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-23 19:49:54,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:54,578 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-23 19:49:54,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:54,578 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:54,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:54,579 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:49:54,579 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:49:54,580 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 [2018-09-23 19:49:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:49:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-23 19:49:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:54,624 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:54,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:54,624 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:54,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:54,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:54,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:54,624 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:54,625 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:54,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:54,625 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-09-23 19:49:54,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:54,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:54,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:54,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:54,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:54,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:54,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:54,829 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:54,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-23 19:49:54,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:54,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:54,858 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:54,858 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:54,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:54,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:54,859 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:54,936 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-23 19:49:54,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:54,936 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:54,937 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:49:54,937 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:49:54,937 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 [2018-09-23 19:49:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:49:54,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-23 19:49:54,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:54,979 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-23 19:49:54,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:54,979 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:54,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:54,979 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:54,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:54,979 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:54,979 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:54,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:54,980 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-09-23 19:49:54,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:54,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:54,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:54,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:54,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:55,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:55,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:55,073 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:55,078 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:55,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:55,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:55,103 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:55,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:55,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:55,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:55,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:55,104 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-23 19:49:55,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:55,187 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-23 19:49:55,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:55,187 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:55,187 INFO L225 Difference]: With dead ends: 31 [2018-09-23 19:49:55,187 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 19:49:55,188 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 [2018-09-23 19:49:55,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 19:49:55,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-23 19:49:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:55,236 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:55,237 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:55,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:55,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:55,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:55,237 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-23 19:49:55,237 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:55,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:55,238 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-09-23 19:49:55,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:55,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:55,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:55,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:55,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:55,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:55,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:55,301 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:55,306 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:49:55,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:55,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:55,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:55,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:55,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:55,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:55,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:55,331 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:55,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:55,407 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-23 19:49:55,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:55,407 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:55,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:55,408 INFO L225 Difference]: With dead ends: 30 [2018-09-23 19:49:55,408 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 19:49:55,409 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 [2018-09-23 19:49:55,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 19:49:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-23 19:49:55,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:49:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-23 19:49:55,440 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-23 19:49:55,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:55,440 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-23 19:49:55,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-23 19:49:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:55,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:55,441 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-23 19:49:55,441 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:55,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-09-23 19:49:55,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:55,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:55,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:55,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:55,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:55,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:55,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:55,503 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:55,511 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:49:55,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:55,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:55,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:55,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:55,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:55,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:55,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:55,535 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-23 19:49:55,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:55,670 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:49:55,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:55,670 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:55,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:55,671 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:49:55,671 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:49:55,671 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 [2018-09-23 19:49:55,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:49:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-23 19:49:55,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:49:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:49:55,725 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:49:55,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:55,725 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:49:55,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:49:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:55,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:55,726 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:55,726 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:55,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:55,727 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-09-23 19:49:55,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:55,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:55,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:55,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:55,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:55,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:55,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:55,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:55,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:55,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:55,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:55,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:55,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:55,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:55,821 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:49:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:55,956 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:49:55,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:55,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:55,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:55,956 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:49:55,956 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:49:55,957 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 [2018-09-23 19:49:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:49:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-23 19:49:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:56,008 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:56,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:56,008 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:56,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:56,008 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:56,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:56,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:56,009 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:56,009 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:56,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:56,009 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-09-23 19:49:56,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:56,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:56,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:56,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:56,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:56,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:56,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:56,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:56,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:56,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:56,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:56,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:56,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:56,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:56,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:56,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:56,171 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:56,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:56,344 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:49:56,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:56,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:56,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:56,344 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:49:56,344 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:49:56,345 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 [2018-09-23 19:49:56,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:49:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-23 19:49:56,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:49:56,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:49:56,397 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:49:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:56,397 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:49:56,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:49:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:56,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:56,398 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:56,398 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:56,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:56,398 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-09-23 19:49:56,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:56,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:56,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:56,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:56,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:56,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:56,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:56,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:56,478 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-23 19:49:56,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:56,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:56,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:56,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:56,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:56,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:56,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:56,508 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:49:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:56,717 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:49:56,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:56,717 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:56,718 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:49:56,718 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:49:56,718 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 [2018-09-23 19:49:56,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:49:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-23 19:49:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:49:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:49:56,796 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-23 19:49:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:56,797 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:49:56,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:56,797 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:49:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:56,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:56,797 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:56,798 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:56,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:56,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-09-23 19:49:56,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:56,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:56,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:56,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:56,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:57,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:57,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:57,610 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:49:57,644 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:49:57,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:57,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:57,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:57,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:57,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:57,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:57,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:57,682 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-23 19:49:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:58,210 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:49:58,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:58,211 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:58,211 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:49:58,211 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:49:58,212 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 [2018-09-23 19:49:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:49:58,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-23 19:49:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:49:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:49:58,294 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:49:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:58,294 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:49:58,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:49:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:58,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:58,295 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:58,295 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:58,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:58,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-09-23 19:49:58,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:58,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:58,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:58,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:58,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:58,395 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 [2018-09-23 19:49:58,401 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:49:58,409 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:49:58,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:58,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:58,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:58,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:58,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:58,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:58,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:58,434 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:49:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:58,577 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:49:58,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:58,577 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:58,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:58,578 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:49:58,578 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:49:58,579 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 [2018-09-23 19:49:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:49:58,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-23 19:49:58,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:49:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:49:58,633 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:49:58,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:58,633 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:49:58,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:49:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:58,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:58,634 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:58,634 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:58,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:58,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-09-23 19:49:58,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:58,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:58,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:58,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:58,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:58,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:58,736 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:49:58,744 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:49:58,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:58,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:58,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:58,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:58,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:58,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:58,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:58,768 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:49:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:58,921 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:49:58,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:58,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:58,922 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:49:58,922 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:49:58,923 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 [2018-09-23 19:49:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:49:58,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-23 19:49:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:49:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:49:58,982 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:49:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:58,983 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:49:58,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:49:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:58,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:58,983 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:58,983 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:58,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-09-23 19:49:58,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:58,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:58,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:58,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:59,092 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:59,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:59,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:59,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:59,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:59,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:59,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:59,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:59,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:59,131 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:49:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:59,277 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:49:59,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:59,277 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:59,277 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:49:59,277 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:49:59,278 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 [2018-09-23 19:49:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:49:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-09-23 19:49:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:49:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:49:59,326 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-23 19:49:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:59,326 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:49:59,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:49:59,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:59,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:59,335 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:49:59,336 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:59,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:59,336 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-09-23 19:49:59,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:59,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:59,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:59,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:49:59,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:59,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:59,386 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 [2018-09-23 19:49:59,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:49:59,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:49:59,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:59,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:59,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:59,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:59,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:59,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:59,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:59,424 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-23 19:49:59,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:59,579 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:49:59,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:59,579 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:59,579 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:49:59,579 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:49:59,580 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 [2018-09-23 19:49:59,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:49:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-23 19:49:59,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:49:59,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:49:59,645 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:49:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:49:59,645 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:49:59,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:49:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:49:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:49:59,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:49:59,645 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:49:59,646 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:49:59,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:49:59,646 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-09-23 19:49:59,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:49:59,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:49:59,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:59,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:49:59,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:49:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:49:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:59,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:49:59,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:49:59,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:49:59,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-23 19:49:59,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:49:59,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:49:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:49:59,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:49:59,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:49:59,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:49:59,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:49:59,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:49:59,756 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:49:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:49:59,965 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:49:59,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:49:59,965 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:49:59,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:49:59,966 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:49:59,966 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:49:59,966 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 [2018-09-23 19:49:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:00,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-23 19:50:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:00,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:00,060 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:50:00,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:00,060 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:00,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:00,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:00,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:00,061 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:50:00,061 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:00,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:00,062 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-09-23 19:50:00,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:00,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:00,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:00,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:00,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:00,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:00,301 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:00,309 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:00,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:00,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:00,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:00,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:00,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:00,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:00,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:00,332 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:50:00,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:00,475 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:50:00,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:00,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:00,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:00,476 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:00,476 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:50:00,476 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 [2018-09-23 19:50:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:50:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-23 19:50:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:00,534 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:50:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:00,534 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:00,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:00,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:00,535 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:50:00,535 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:00,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:00,535 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-09-23 19:50:00,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:00,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:00,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:00,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:00,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:00,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:00,644 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:00,652 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:50:00,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:00,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:00,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:00,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:00,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:00,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:00,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:00,676 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:50:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:00,817 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:50:00,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:00,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:00,818 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:00,818 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:50:00,818 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 [2018-09-23 19:50:00,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:00,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-23 19:50:00,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:50:00,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:50:00,870 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-23 19:50:00,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:00,870 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:50:00,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:50:00,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:00,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:00,871 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:50:00,871 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:00,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:00,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-09-23 19:50:00,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:00,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:00,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:00,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:01,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:01,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:01,015 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:01,022 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:50:01,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:01,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:01,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:01,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:01,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:01,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:01,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:01,046 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-23 19:50:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:01,177 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:01,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:01,177 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:01,178 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:01,178 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:01,178 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 [2018-09-23 19:50:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-23 19:50:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:01,241 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:50:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:01,241 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:01,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:01,241 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:01,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:01,241 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:50:01,242 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:01,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-09-23 19:50:01,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:01,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:01,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:01,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:01,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:01,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:01,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:01,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:01,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:01,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:01,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:01,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:01,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:01,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:01,389 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:50:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:01,524 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:01,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:01,524 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:01,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:01,524 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:01,524 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:01,525 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 [2018-09-23 19:50:01,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:01,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-23 19:50:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:01,582 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:50:01,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:01,582 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:01,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:01,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:01,583 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:50:01,583 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:01,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:01,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-09-23 19:50:01,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:01,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:01,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:01,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:01,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:02,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:02,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:02,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:02,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:02,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:02,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:02,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:02,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:02,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:02,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:02,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:02,444 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:50:02,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:02,593 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:02,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:02,593 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:02,593 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:02,593 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:02,594 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 [2018-09-23 19:50:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-23 19:50:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:02,653 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:50:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:02,653 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:02,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:02,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:02,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:02,654 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-23 19:50:02,654 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:02,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:02,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-09-23 19:50:02,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:02,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:02,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:02,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:02,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:02,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:02,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:02,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:02,743 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-23 19:50:02,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:02,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:02,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:02,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:02,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:02,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:02,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:02,767 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:50:02,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:02,901 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:50:02,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:02,901 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:02,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:02,902 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:02,902 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:02,902 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 [2018-09-23 19:50:02,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-09-23 19:50:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:50:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:50:02,943 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-23 19:50:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:02,944 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:50:02,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:50:02,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:02,944 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:02,944 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:50:02,944 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:02,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-09-23 19:50:02,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:02,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:02,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:02,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:02,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:02,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:02,998 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 [2018-09-23 19:50:03,005 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:03,010 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:03,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:03,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:03,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:03,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:03,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:03,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:03,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:03,034 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-23 19:50:03,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:03,215 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:03,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:03,215 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:03,215 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:03,215 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:03,215 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 [2018-09-23 19:50:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-23 19:50:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:03,276 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:50:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:03,276 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:03,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:03,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:03,276 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:50:03,277 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:03,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:03,277 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-09-23 19:50:03,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:03,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:03,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:03,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:03,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:03,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:03,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:03,341 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:03,349 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:50:03,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:03,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:03,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:03,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:03,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:03,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:03,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:03,372 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:50:03,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:03,521 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:03,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:03,522 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:03,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:03,523 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:03,523 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:03,524 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 [2018-09-23 19:50:03,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-23 19:50:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:03,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:03,590 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:50:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:03,591 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:03,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:03,591 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:03,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:03,591 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:50:03,591 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:03,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:03,592 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-09-23 19:50:03,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:03,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:03,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:03,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:03,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:03,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:03,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:03,654 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:03,667 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:50:03,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:03,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:03,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:03,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:03,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:03,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:03,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:03,690 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:50:03,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:03,835 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:50:03,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:03,835 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:03,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:03,836 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:03,836 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:03,836 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 [2018-09-23 19:50:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-23 19:50:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:03,921 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:50:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:03,921 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:03,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:03,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:03,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:03,921 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:50:03,921 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:03,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:03,922 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-09-23 19:50:03,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:03,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:03,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:03,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:03,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:03,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:03,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:03,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:03,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:04,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:04,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:04,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:04,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:04,016 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:50:04,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:04,149 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:50:04,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:04,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:04,155 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:50:04,155 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:50:04,155 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 [2018-09-23 19:50:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:50:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-23 19:50:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:50:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:50:04,211 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-23 19:50:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:04,211 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:50:04,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:04,212 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:50:04,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:04,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:04,212 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:50:04,212 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:04,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:04,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-09-23 19:50:04,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:04,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:04,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:04,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:04,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:04,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:04,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:04,275 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:04,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:04,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:04,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:04,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:04,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:04,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:04,298 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-23 19:50:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:04,435 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:04,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:04,435 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:04,436 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:04,436 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:04,436 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 [2018-09-23 19:50:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:04,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-23 19:50:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:04,507 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:50:04,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:04,507 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:04,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:04,507 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:04,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:04,508 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:50:04,508 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:04,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:04,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-09-23 19:50:04,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:04,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:04,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:04,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:04,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:04,562 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 [2018-09-23 19:50:04,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:04,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-23 19:50:04,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:04,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:04,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:04,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:04,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:04,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:04,601 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:50:04,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:04,745 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:04,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:04,745 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:04,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:04,746 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:04,746 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:04,746 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 [2018-09-23 19:50:04,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-23 19:50:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:04,812 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:50:04,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:04,812 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:04,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:04,813 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:04,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:04,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:04,813 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:50:04,813 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:04,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:04,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-09-23 19:50:04,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:04,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:04,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:04,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:04,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:04,892 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 [2018-09-23 19:50:04,900 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:04,904 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:04,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:04,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:04,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:04,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:04,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:04,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:04,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:04,928 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:50:05,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:05,057 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:50:05,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:05,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:05,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:05,058 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:05,058 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:05,058 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 [2018-09-23 19:50:05,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-23 19:50:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:05,126 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:50:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:05,126 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:05,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:05,126 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:05,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:05,127 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-23 19:50:05,127 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:05,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:05,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-09-23 19:50:05,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:05,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:05,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:05,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:05,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:05,188 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:05,188 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 [2018-09-23 19:50:05,195 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:05,203 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:50:05,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:05,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:05,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:05,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:05,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:05,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:05,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:05,237 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:50:05,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:05,771 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:50:05,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:05,771 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:05,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:05,771 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:50:05,772 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:50:05,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:05,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:50:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-23 19:50:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:50:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:50:05,849 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-23 19:50:05,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:05,850 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:50:05,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:50:05,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:05,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:05,850 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-23 19:50:05,850 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:05,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:05,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-09-23 19:50:05,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:05,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:05,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:05,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:05,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:05,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:05,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:05,988 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:05,995 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:50:05,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:05,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:06,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:06,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:06,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:06,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:06,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:06,019 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-23 19:50:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:06,146 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:50:06,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:06,146 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:06,146 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:50:06,146 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:50:06,146 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 [2018-09-23 19:50:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:50:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-23 19:50:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:06,218 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:50:06,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:06,219 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:06,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:06,219 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:06,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:06,219 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:50:06,219 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:06,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:06,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-09-23 19:50:06,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:06,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:06,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:06,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:06,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:06,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:06,575 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 [2018-09-23 19:50:06,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:06,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:06,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:06,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:06,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:06,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:06,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:06,612 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:50:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:06,732 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:50:06,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:06,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:06,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:06,732 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:50:06,732 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:50:06,732 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 [2018-09-23 19:50:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:50:06,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-23 19:50:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:06,822 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:50:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:06,822 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:06,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:06,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:06,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:06,822 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:50:06,823 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:06,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:06,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-09-23 19:50:06,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:06,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:06,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:06,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:06,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:06,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:06,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:06,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:06,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:06,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:06,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:06,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:06,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:06,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:06,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:06,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:06,961 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:50:07,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:07,131 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:50:07,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:07,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:07,132 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:50:07,132 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:50:07,132 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 [2018-09-23 19:50:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:50:07,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-23 19:50:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:07,199 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:50:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:07,199 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:07,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:07,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:07,200 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-23 19:50:07,200 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:07,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:07,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-09-23 19:50:07,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:07,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:07,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:07,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:07,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:07,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:07,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:07,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:07,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-23 19:50:07,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:07,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:07,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:07,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:07,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:07,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:07,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:07,432 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:50:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:07,559 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:50:07,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:07,559 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:07,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:07,559 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:50:07,560 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:50:07,560 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 [2018-09-23 19:50:07,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:50:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-23 19:50:07,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:50:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:50:07,652 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-23 19:50:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:07,652 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:50:07,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:50:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:07,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:07,653 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-23 19:50:07,653 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:07,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-09-23 19:50:07,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:07,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:07,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:07,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:07,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:07,956 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:07,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:07,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:07,964 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:07,969 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:07,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:07,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:07,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:07,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:07,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:07,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:07,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:07,997 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-23 19:50:08,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:08,118 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-23 19:50:08,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:08,118 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:08,119 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:50:08,119 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:50:08,119 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 [2018-09-23 19:50:08,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:50:08,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-09-23 19:50:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:08,192 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:50:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:08,192 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:08,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:08,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:08,192 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-23 19:50:08,193 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:08,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:08,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-09-23 19:50:08,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:08,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:08,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:08,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:08,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:08,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:08,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:08,260 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:08,267 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 19:50:08,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:08,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:08,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:08,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:08,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:08,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:08,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:08,292 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:50:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:08,441 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-23 19:50:08,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:08,441 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:08,441 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:50:08,441 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:50:08,442 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 [2018-09-23 19:50:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:50:08,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-09-23 19:50:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:08,521 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-23 19:50:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:08,522 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:08,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:08,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:08,522 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-23 19:50:08,522 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:08,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:08,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-09-23 19:50:08,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:08,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:08,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:08,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:08,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:08,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:08,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:08,603 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:08,613 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:50:08,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:08,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:08,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:08,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:08,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:08,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:08,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:08,637 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-23 19:50:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:08,764 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-23 19:50:08,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:08,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:08,765 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:50:08,765 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:50:08,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:08,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:50:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-09-23 19:50:08,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:08,841 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-23 19:50:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:08,841 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:08,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:50:08,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:08,841 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-23 19:50:08,841 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:08,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-09-23 19:50:08,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:08,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:08,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:08,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:08,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:08,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:08,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:08,918 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:08,924 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:50:08,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:08,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:08,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:08,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:50:08,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:50:08,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:50:08,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:50:08,949 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-23 19:50:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:09,078 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-09-23 19:50:09,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:50:09,078 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-23 19:50:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:09,079 INFO L225 Difference]: With dead ends: 32 [2018-09-23 19:50:09,079 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 19:50:09,079 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 [2018-09-23 19:50:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 19:50:09,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-09-23 19:50:09,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 19:50:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-23 19:50:09,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-23 19:50:09,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:09,149 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-23 19:50:09,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:50:09,149 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-23 19:50:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:09,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:09,149 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-23 19:50:09,150 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:09,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:09,150 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-09-23 19:50:09,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:09,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:09,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:09,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:09,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:09,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:09,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:09,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:09,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:09,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:09,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:09,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:09,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:09,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:09,388 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-09-23 19:50:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:09,589 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:50:09,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:09,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:09,590 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:09,591 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:50:09,591 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 [2018-09-23 19:50:09,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:50:09,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-23 19:50:09,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:09,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:09,677 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:09,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:09,678 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:09,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:09,678 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:09,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:09,678 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:50:09,678 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:09,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:09,679 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-09-23 19:50:09,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:09,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:09,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:09,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:09,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:09,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:09,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:09,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:09,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:09,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:09,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:09,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:09,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:09,796 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:09,996 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:50:09,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:09,996 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:09,997 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:09,997 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:50:09,997 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 [2018-09-23 19:50:09,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:50:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-23 19:50:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:10,084 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:10,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:10,084 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:10,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:10,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:10,085 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:50:10,085 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:10,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-09-23 19:50:10,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:10,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:10,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:10,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:10,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:10,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:10,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:10,159 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:10,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:10,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:10,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:10,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:10,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:10,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:10,185 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:10,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:10,406 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:50:10,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:10,406 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:10,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:10,407 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:10,407 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:50:10,407 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 [2018-09-23 19:50:10,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:50:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-23 19:50:10,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:10,492 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:10,492 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:10,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:10,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:10,492 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:10,493 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:10,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:10,493 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-09-23 19:50:10,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:10,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:10,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:10,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:10,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:10,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:10,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:10,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:10,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:10,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:10,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:10,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:10,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:10,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:10,601 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:10,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:10,804 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:50:10,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:10,804 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:10,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:10,805 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:10,805 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:50:10,805 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 [2018-09-23 19:50:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:50:10,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-23 19:50:10,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:10,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:10,882 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-23 19:50:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:10,882 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:10,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:10,883 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:10,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:10,883 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:50:10,883 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:10,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:10,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-09-23 19:50:10,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:10,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:10,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:10,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:10,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:10,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:10,964 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:10,970 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:10,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:10,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:10,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:10,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:10,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:10,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:10,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:10,994 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-23 19:50:11,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:11,193 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:50:11,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:11,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:11,194 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:11,194 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:50:11,194 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 [2018-09-23 19:50:11,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-23 19:50:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:11,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:11,279 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:11,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:11,279 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:11,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:11,279 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:11,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:11,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:11,279 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:11,280 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:11,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:11,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-09-23 19:50:11,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:11,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:11,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:11,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:11,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:11,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:11,378 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 [2018-09-23 19:50:11,385 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:11,395 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:11,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:11,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:11,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:11,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:11,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:11,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:11,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:11,422 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:11,600 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:50:11,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:11,600 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:11,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:11,601 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:11,601 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:50:11,601 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 [2018-09-23 19:50:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:11,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-23 19:50:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:11,693 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:11,693 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:11,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:11,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:11,694 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:11,694 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:11,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:11,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-09-23 19:50:11,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:11,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:11,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:11,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:11,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:11,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:11,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:11,874 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:11,888 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:11,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:11,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:11,912 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:11,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:11,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:11,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:11,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:11,912 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:12,089 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:12,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:12,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:12,090 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:12,090 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:12,090 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 [2018-09-23 19:50:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:12,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-23 19:50:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:12,185 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:12,185 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:12,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:12,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:12,185 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:12,186 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:12,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:12,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-09-23 19:50:12,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:12,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:12,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:12,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:12,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:12,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:12,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:12,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:12,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:12,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:12,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:12,297 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:12,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:12,478 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:12,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:12,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:12,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:12,479 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:12,479 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:12,479 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 [2018-09-23 19:50:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:12,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-23 19:50:12,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:50:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:50:12,552 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-23 19:50:12,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:12,552 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:50:12,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:12,553 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:50:12,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:12,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:12,553 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:50:12,553 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:12,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:12,554 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-09-23 19:50:12,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:12,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:12,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:12,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:12,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:12,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:12,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:12,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:12,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:12,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:12,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:12,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:12,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:12,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:12,674 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-23 19:50:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:12,887 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:50:12,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:12,887 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:12,888 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:12,888 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:50:12,888 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 [2018-09-23 19:50:12,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:50:12,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-23 19:50:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:12,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:12,984 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:12,984 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:12,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:12,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:12,985 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:12,985 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:12,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-09-23 19:50:12,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:12,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:12,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:12,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:13,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:13,058 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:13,066 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:13,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:13,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:13,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:13,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:13,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:13,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:13,091 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:13,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:13,319 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:50:13,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:13,319 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:13,320 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:13,320 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:50:13,320 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 [2018-09-23 19:50:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:50:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-23 19:50:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:13,410 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:13,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:13,410 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:13,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:13,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:13,411 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:13,411 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:13,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:13,411 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-09-23 19:50:13,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:13,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:13,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:13,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:13,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:13,483 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:13,489 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:13,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:13,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:13,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:13,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:13,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:13,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:13,513 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:13,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:13,747 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:50:13,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:13,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:13,747 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:13,747 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:50:13,748 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 [2018-09-23 19:50:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:50:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-23 19:50:13,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:13,842 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:13,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:13,842 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:13,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:13,842 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:13,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:13,842 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:13,842 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:13,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:13,843 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-09-23 19:50:13,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:13,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:13,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:13,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:13,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:13,926 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:13,935 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:13,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:13,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:13,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:13,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:13,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:13,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:13,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:13,959 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:14,169 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:50:14,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:14,169 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:14,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:14,170 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:14,170 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:50:14,170 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 [2018-09-23 19:50:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:50:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-23 19:50:14,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:14,255 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-23 19:50:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:14,255 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:14,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:14,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:14,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:14,255 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:14,255 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:14,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:14,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-09-23 19:50:14,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:14,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:14,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:14,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:14,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:14,328 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:14,338 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:14,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:14,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:14,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:14,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:14,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:14,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:14,366 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-23 19:50:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:14,571 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:50:14,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:14,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:14,572 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:14,572 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:50:14,572 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 [2018-09-23 19:50:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-23 19:50:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:14,663 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:14,663 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:14,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:14,664 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:14,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:14,664 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:14,664 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:14,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:14,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-09-23 19:50:14,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:14,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:14,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:14,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,924 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:14,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:14,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:14,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:14,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:14,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:14,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:14,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:14,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:14,961 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:15,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:15,160 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:50:15,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:15,160 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:15,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:15,161 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:15,161 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:50:15,161 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 [2018-09-23 19:50:15,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:15,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-23 19:50:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:15,253 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:15,253 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:15,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:15,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:15,253 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:15,254 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:15,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:15,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-09-23 19:50:15,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:15,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:15,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:15,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:15,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:15,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:15,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:15,334 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:15,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:15,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:15,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:15,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:15,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:15,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:15,362 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:15,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:15,566 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:15,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:15,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:15,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:15,567 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:15,567 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:15,567 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 [2018-09-23 19:50:15,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:15,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-23 19:50:15,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:15,671 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:15,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:15,671 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:15,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:15,671 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:15,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:15,672 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:15,672 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:15,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:15,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-09-23 19:50:15,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:15,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:15,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:15,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:15,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:15,822 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 [2018-09-23 19:50:15,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:15,837 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:15,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:15,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:15,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:15,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:15,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:15,861 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:16,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:16,054 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:16,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:16,054 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:16,055 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:16,055 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:16,055 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 [2018-09-23 19:50:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-23 19:50:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:50:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:50:16,137 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-23 19:50:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:16,137 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:50:16,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:50:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:16,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:16,137 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:50:16,137 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:16,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-09-23 19:50:16,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:16,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:16,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:16,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:16,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:16,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:16,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:16,223 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:16,230 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:16,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:16,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:16,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:16,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:16,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:16,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:16,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:16,252 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-23 19:50:16,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:16,468 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:16,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:16,468 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:16,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:16,469 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:16,469 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:16,469 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 [2018-09-23 19:50:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-23 19:50:16,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:16,562 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:16,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:16,563 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:16,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:16,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:16,563 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:16,563 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:16,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:16,563 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-09-23 19:50:16,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:16,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:16,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:16,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:16,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:16,638 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:16,638 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 [2018-09-23 19:50:16,645 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:16,657 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:16,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:16,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:16,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:16,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:16,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:16,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:16,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:16,681 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:16,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:16,879 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:16,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:16,879 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:16,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:16,880 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:16,880 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:16,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:16,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-23 19:50:16,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:16,980 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:16,980 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:16,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:16,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:16,981 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:16,981 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:16,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:16,981 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-09-23 19:50:16,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:16,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:16,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:16,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:16,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:17,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:17,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:17,055 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:17,064 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:17,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:17,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:17,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:17,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:17,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:17,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:17,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:17,088 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:17,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:17,288 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:17,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:17,288 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:17,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:17,289 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:17,289 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:17,289 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 [2018-09-23 19:50:17,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-23 19:50:17,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:17,395 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:17,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:17,395 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:17,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:17,395 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:17,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:17,396 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:17,396 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:17,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:17,396 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-09-23 19:50:17,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:17,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:17,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:17,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:17,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:17,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:17,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:17,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:17,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:17,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:17,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:17,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:17,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:17,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:17,493 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:17,679 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:50:17,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:17,679 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:17,679 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:17,679 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:17,679 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 [2018-09-23 19:50:17,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-23 19:50:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:17,773 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-23 19:50:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:17,774 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:17,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:17,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:17,774 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:17,774 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:17,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:17,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-09-23 19:50:17,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:17,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:17,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:17,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:17,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:17,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:17,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:17,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:17,851 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:17,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:17,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:17,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:17,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:17,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:17,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:17,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:17,875 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-23 19:50:18,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:18,087 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:18,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:18,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:18,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:18,088 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:18,088 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:18,088 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 [2018-09-23 19:50:18,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:18,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-23 19:50:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:18,195 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:18,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:18,195 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:18,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:18,195 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:18,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:18,196 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:18,196 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:18,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:18,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-09-23 19:50:18,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:18,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:18,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:18,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:18,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:18,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:18,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:18,275 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:18,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:18,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:18,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:18,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:18,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:18,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:18,300 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:18,509 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:18,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:18,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:18,510 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:18,510 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:18,510 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 [2018-09-23 19:50:18,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-23 19:50:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:18,614 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:18,614 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:18,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:18,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:18,615 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:18,615 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:18,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:18,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-09-23 19:50:18,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:18,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:18,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:18,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:18,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:18,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:18,684 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:18,691 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:18,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:18,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:18,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:18,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:18,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:18,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:18,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:18,715 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:18,921 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:18,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:18,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:18,922 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:18,922 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:18,922 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 [2018-09-23 19:50:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:19,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-23 19:50:19,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:19,029 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:19,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:19,029 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:19,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:19,029 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:19,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:19,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:19,029 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:19,029 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:19,030 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:19,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-09-23 19:50:19,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:19,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:19,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:19,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:19,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:19,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:19,090 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:19,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:19,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:19,098 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:19,107 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:19,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:19,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:19,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:19,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:19,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:19,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:19,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:19,131 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:19,328 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:50:19,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:19,329 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:19,329 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:19,329 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:19,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-23 19:50:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:50:19,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:50:19,404 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-23 19:50:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:19,405 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:50:19,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:50:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:19,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:19,405 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:19,405 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:19,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:19,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-09-23 19:50:19,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:19,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:19,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:19,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:19,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:19,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:19,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:19,476 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:19,484 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:19,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:19,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:19,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:19,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:19,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:19,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:19,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:19,508 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-23 19:50:19,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:19,706 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:50:19,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:19,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:19,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:19,707 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:19,707 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:19,707 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 [2018-09-23 19:50:19,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:19,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-23 19:50:19,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:19,808 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:19,808 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:19,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:19,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:19,808 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:19,809 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:19,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:19,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-09-23 19:50:19,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:19,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:19,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:19,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:19,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:19,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:19,912 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 [2018-09-23 19:50:19,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:19,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:19,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:19,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:19,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:19,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:19,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:19,951 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:20,145 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:50:20,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:20,145 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:20,146 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:50:20,146 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:50:20,147 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 [2018-09-23 19:50:20,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:50:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-23 19:50:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:20,261 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:20,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:20,261 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:20,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:20,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:20,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:20,261 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:20,262 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:20,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:20,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-09-23 19:50:20,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:20,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:20,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:20,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:20,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:20,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:20,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:20,329 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:20,351 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:20,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:20,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:20,373 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:20,373 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:20,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:20,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:20,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:20,374 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:20,588 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:50:20,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:20,588 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:20,589 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:20,589 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:20,589 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 [2018-09-23 19:50:20,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:20,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-23 19:50:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:20,701 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:20,701 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:20,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:20,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:20,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:20,701 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:20,702 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:20,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:20,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-09-23 19:50:20,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:20,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:20,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:20,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:20,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:20,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:20,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:20,779 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:20,790 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:20,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:20,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:20,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:20,814 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:20,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:20,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:20,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:20,814 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:21,011 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:50:21,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:21,011 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:21,011 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:50:21,011 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:50:21,012 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 [2018-09-23 19:50:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:50:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-23 19:50:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:21,112 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-23 19:50:21,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:21,112 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:21,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:21,112 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:21,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:21,113 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:21,113 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:21,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:21,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-09-23 19:50:21,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:21,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:21,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:21,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:21,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:21,178 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 [2018-09-23 19:50:21,186 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:21,192 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:21,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:21,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:21,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:21,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:21,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:21,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:21,215 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-23 19:50:21,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:21,403 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:50:21,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:21,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:21,403 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:50:21,403 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:50:21,404 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 [2018-09-23 19:50:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:50:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-23 19:50:21,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:21,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:21,515 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:21,515 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:21,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:21,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:21,516 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:21,516 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:21,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:21,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-09-23 19:50:21,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:21,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:21,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:21,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:21,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:21,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:21,648 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:21,657 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:21,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:21,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:21,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:21,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:21,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:21,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:21,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:21,682 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:21,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:21,839 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:50:21,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:21,839 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:21,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:21,839 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:50:21,840 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:50:21,840 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 [2018-09-23 19:50:21,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:50:21,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-23 19:50:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:21,945 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:21,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:21,945 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:21,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:21,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:21,946 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:21,946 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:21,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:21,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-09-23 19:50:21,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:21,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:21,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:21,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:21,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:22,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:22,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:22,011 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:22,022 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:22,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:22,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:22,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:22,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:22,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:22,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:22,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:22,051 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:22,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:22,209 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-23 19:50:22,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:22,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:22,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:22,210 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:50:22,210 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:50:22,210 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 [2018-09-23 19:50:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:50:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-23 19:50:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:22,318 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:22,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:22,318 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:22,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:22,318 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:22,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:22,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:22,318 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:22,319 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:22,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:22,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-09-23 19:50:22,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:22,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:22,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:22,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:22,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:22,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:22,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:22,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:22,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:22,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:22,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:22,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:22,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:22,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:22,422 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:22,576 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-23 19:50:22,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:22,576 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:22,577 INFO L225 Difference]: With dead ends: 34 [2018-09-23 19:50:22,577 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:50:22,577 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 [2018-09-23 19:50:22,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:50:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-23 19:50:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:50:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:50:22,646 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-23 19:50:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:22,647 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:50:22,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:50:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:22,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:22,647 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:50:22,647 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:22,647 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:22,647 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-09-23 19:50:22,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:22,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:22,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:22,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:22,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:22,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:22,806 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:22,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:22,818 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:22,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:22,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:22,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:22,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:22,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:22,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:22,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:22,852 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-23 19:50:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:23,153 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:50:23,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:23,153 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:23,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:23,154 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:23,154 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:50:23,154 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 [2018-09-23 19:50:23,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:50:23,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-23 19:50:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:23,268 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:23,269 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:23,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:23,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:23,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:23,269 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:23,269 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:23,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-09-23 19:50:23,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:23,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:23,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:23,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:23,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:23,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:23,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:23,336 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:23,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:23,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:23,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:23,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:23,370 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:23,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:23,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:23,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:23,370 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:23,635 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:50:23,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:23,635 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:23,636 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:23,636 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:50:23,636 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 [2018-09-23 19:50:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:50:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-23 19:50:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:23,792 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:23,793 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:23,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:23,793 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:23,793 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:23,793 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:23,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:23,793 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-09-23 19:50:23,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:23,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:23,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:23,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:23,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:23,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:23,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:23,892 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:23,899 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:23,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:23,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:23,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:23,923 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:23,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:23,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:23,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:23,923 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:24,199 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:50:24,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:24,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:24,200 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:24,200 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:50:24,200 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 [2018-09-23 19:50:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:50:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-23 19:50:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:24,325 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:24,325 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:24,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:24,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:24,325 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:24,325 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:24,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:24,325 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-09-23 19:50:24,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:24,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:24,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:24,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:24,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:24,411 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:24,418 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:24,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:24,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:24,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:24,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:24,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:24,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:24,444 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:24,707 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:50:24,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:24,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:24,708 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:24,708 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:50:24,708 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 [2018-09-23 19:50:24,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:50:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-23 19:50:24,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:24,812 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-23 19:50:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:24,812 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:24,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:24,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:24,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:24,813 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:24,813 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:24,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:24,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-09-23 19:50:24,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:24,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:24,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:24,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:24,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:24,875 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 [2018-09-23 19:50:24,884 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:24,893 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:24,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:24,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:24,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:24,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:24,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:24,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:24,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:24,925 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-23 19:50:25,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:25,182 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:50:25,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:25,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:25,182 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:25,182 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:50:25,183 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 [2018-09-23 19:50:25,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-23 19:50:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:25,299 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:25,299 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:25,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:25,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:25,299 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:25,300 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:25,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:25,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-09-23 19:50:25,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:25,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:25,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:25,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:25,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:25,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:25,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:25,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:25,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:25,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:25,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:25,403 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:25,666 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:50:25,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:25,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:25,667 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:25,667 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:50:25,667 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 [2018-09-23 19:50:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:25,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-23 19:50:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:25,792 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:25,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:25,792 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:25,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:25,792 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:25,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:25,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:25,793 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:25,793 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:25,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:25,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-09-23 19:50:25,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:25,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:25,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:25,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:25,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:25,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:25,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:25,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:25,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:25,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:25,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:25,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:25,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:25,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:25,896 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:26,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:26,153 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:26,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:26,153 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:26,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:26,154 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:26,154 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:26,154 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 [2018-09-23 19:50:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-23 19:50:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:26,280 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:26,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:26,280 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:26,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:26,280 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:26,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:26,280 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:26,281 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:26,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:26,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-09-23 19:50:26,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:26,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:26,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:26,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:26,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:26,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:26,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:26,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:26,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:26,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:26,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:26,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:26,452 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:26,688 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:26,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:26,688 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:26,689 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:26,689 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:26,689 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 [2018-09-23 19:50:26,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-23 19:50:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:50:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:50:26,789 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-23 19:50:26,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:26,790 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:50:26,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:26,790 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:50:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:26,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:26,790 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:26,790 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:26,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:26,790 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-09-23 19:50:26,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:26,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:26,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:26,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:26,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:26,897 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:26,918 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:26,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:26,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:26,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:26,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:26,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:26,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:26,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:26,942 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-23 19:50:27,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:27,216 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:50:27,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:27,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:27,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:27,216 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:27,216 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:50:27,217 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 [2018-09-23 19:50:27,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:50:27,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-23 19:50:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:27,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:27,345 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:27,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:27,346 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:27,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:27,346 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:27,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:27,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:27,346 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:27,347 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:27,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:27,347 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-09-23 19:50:27,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:27,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:27,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:27,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:27,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:27,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:27,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:27,421 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:27,433 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:27,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:27,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:27,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:27,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:27,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:27,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:27,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:27,458 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:27,732 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:50:27,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:27,732 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:27,733 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:27,733 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:50:27,733 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 [2018-09-23 19:50:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:50:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-23 19:50:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:27,860 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:27,860 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:27,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:27,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:27,861 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:27,861 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:27,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:27,861 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-09-23 19:50:27,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:27,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:27,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:27,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:27,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:27,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:27,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:27,956 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:27,965 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:27,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:27,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:27,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:27,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:27,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:27,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:27,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:27,996 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:28,291 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:50:28,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:28,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:28,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:28,292 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:28,292 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:50:28,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:50:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-23 19:50:28,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:28,422 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:28,422 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:28,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:28,422 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:28,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:28,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:28,423 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:28,423 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:28,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:28,423 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-09-23 19:50:28,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:28,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:28,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:28,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:28,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:28,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:28,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:28,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:28,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:28,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:28,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:28,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:28,529 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:28,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:28,809 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:50:28,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:28,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:28,809 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:28,809 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:50:28,810 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 [2018-09-23 19:50:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:50:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-23 19:50:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:28,928 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-23 19:50:28,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:28,928 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:28,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:28,928 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:28,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:28,928 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:28,928 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:28,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:28,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-09-23 19:50:28,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:28,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:28,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:28,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:28,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:28,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:28,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:28,997 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:29,003 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:29,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:29,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:29,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:29,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:29,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:29,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:29,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:29,026 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-23 19:50:29,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:29,300 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:50:29,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:29,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:29,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:29,301 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:29,301 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:50:29,301 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 [2018-09-23 19:50:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-23 19:50:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:29,433 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:29,434 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:29,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:29,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:29,434 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:29,434 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:29,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:29,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-09-23 19:50:29,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:29,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:29,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:29,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:29,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:29,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:29,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:29,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:29,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:29,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:29,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:29,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:29,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:29,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:29,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:29,539 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:29,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:29,800 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:50:29,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:29,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:29,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:29,801 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:29,801 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:50:29,801 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 [2018-09-23 19:50:29,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:29,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-23 19:50:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:29,925 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:29,926 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:29,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:29,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:29,926 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:29,926 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:29,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:29,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-09-23 19:50:29,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:29,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:29,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:29,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:29,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:29,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:29,998 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:30,003 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:30,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:30,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:30,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:30,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:30,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:30,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:30,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:30,028 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:30,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:30,295 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:30,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:30,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:30,296 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:30,296 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:30,296 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 [2018-09-23 19:50:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-23 19:50:30,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:30,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:30,414 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:30,415 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:30,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:30,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:30,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:30,415 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:30,415 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:30,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:30,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-09-23 19:50:30,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:30,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:30,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:30,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:30,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:30,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:30,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:30,513 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:30,541 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:30,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:30,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:30,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:30,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:30,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:30,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:30,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:30,565 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:30,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:30,985 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:30,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:30,985 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:30,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:30,985 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:30,986 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:30,986 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 [2018-09-23 19:50:30,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-23 19:50:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:50:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:50:31,145 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-23 19:50:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:31,145 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:50:31,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:50:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:31,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:31,146 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:31,146 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:31,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:31,146 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-09-23 19:50:31,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:31,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:31,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:31,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:31,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:32,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:32,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:32,169 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:32,275 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:32,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:32,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:32,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:32,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:32,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:32,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:32,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:32,312 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-23 19:50:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:32,634 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:32,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:32,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:32,635 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:32,635 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:32,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:32,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-23 19:50:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:32,785 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:32,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:32,785 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:32,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:32,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:32,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:32,786 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:32,786 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:32,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:32,786 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-09-23 19:50:32,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:32,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:32,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:32,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:32,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:32,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:32,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:32,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:32,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:32,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:32,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:32,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:32,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:32,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:32,900 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:33,173 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:33,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:33,173 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:33,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:33,174 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:33,174 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:33,174 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 [2018-09-23 19:50:33,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:33,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-23 19:50:33,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:33,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:33,309 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:33,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:33,309 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:33,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:33,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:33,309 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:33,310 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:33,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:33,310 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-09-23 19:50:33,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:33,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:33,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:33,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:33,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:33,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:33,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:33,377 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:33,383 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:33,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:33,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:33,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:33,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:33,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:33,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:33,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:33,408 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:33,655 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:33,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:33,655 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:33,656 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:33,656 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:33,656 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 [2018-09-23 19:50:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:33,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-23 19:50:33,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:33,792 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:33,792 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:33,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:33,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:33,792 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:33,792 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:33,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:33,793 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-09-23 19:50:33,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:33,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:33,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:33,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:33,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:33,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:33,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:33,863 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:33,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:33,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:33,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:33,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:33,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:33,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:33,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:33,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:33,896 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:34,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:34,146 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:50:34,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:34,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:34,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:34,147 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:34,147 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:34,147 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 [2018-09-23 19:50:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:34,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-23 19:50:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:34,262 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-23 19:50:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:34,262 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:34,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:34,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:34,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:34,262 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:34,262 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:34,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:34,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-09-23 19:50:34,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:34,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:34,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:34,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:34,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:34,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:34,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:34,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:34,335 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:34,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:34,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:34,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:34,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:34,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:34,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:34,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:34,360 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-23 19:50:34,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:34,621 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:34,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:34,621 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:34,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:34,622 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:34,622 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:34,622 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 [2018-09-23 19:50:34,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-23 19:50:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:34,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:34,759 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:34,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:34,759 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:34,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:34,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:34,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:34,759 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:34,759 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:34,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:34,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-09-23 19:50:34,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:34,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:34,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:34,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:34,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:34,821 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:34,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:34,830 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:34,840 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:34,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:34,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:34,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:34,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:34,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:34,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:34,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:34,866 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:35,137 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:50:35,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:35,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:35,137 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:50:35,137 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:50:35,137 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 [2018-09-23 19:50:35,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:50:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-23 19:50:35,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:35,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:35,261 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:35,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:35,261 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:35,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:35,261 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:35,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:35,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:35,262 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:35,262 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:35,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:35,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-09-23 19:50:35,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:35,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:35,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:35,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:35,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:35,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:35,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:35,330 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:35,339 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:35,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:35,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:35,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:35,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:35,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:35,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:35,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:35,364 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:35,603 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:50:35,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:35,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:35,604 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:50:35,604 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:50:35,604 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 [2018-09-23 19:50:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:50:35,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-23 19:50:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:35,745 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:35,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:35,745 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:35,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:35,745 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:35,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:35,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:35,746 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:35,746 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:35,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:35,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-09-23 19:50:35,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:35,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:35,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:35,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:35,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:35,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:35,830 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 [2018-09-23 19:50:35,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:35,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:35,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:35,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:35,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:35,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:35,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:35,867 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:36,106 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:50:36,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:36,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:36,107 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:36,107 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:36,107 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 [2018-09-23 19:50:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:36,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-23 19:50:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:50:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:50:36,217 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-23 19:50:36,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:36,218 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:50:36,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:50:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:36,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:36,218 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:36,218 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:36,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:36,218 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-09-23 19:50:36,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:36,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:36,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:36,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:36,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:36,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:36,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:36,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:36,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:36,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:36,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:36,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:36,546 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:36,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:36,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:36,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:36,547 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-23 19:50:36,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:36,778 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:50:36,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:36,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:36,779 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:36,779 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:36,779 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 [2018-09-23 19:50:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-23 19:50:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:36,937 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:36,937 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:36,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:36,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:36,938 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:36,938 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:36,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:36,938 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-09-23 19:50:36,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:36,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:36,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:36,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:36,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:37,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:37,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:37,013 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:37,022 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:37,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:37,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:37,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:37,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:37,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:37,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:37,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:37,047 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:37,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:37,252 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:50:37,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:37,252 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:37,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:37,252 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:50:37,252 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:50:37,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:50:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-23 19:50:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:37,387 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:37,387 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:37,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:37,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:37,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:37,388 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:37,388 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:37,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:37,388 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-09-23 19:50:37,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:37,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:37,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:37,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:37,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:37,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:37,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:37,476 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:37,482 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:37,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:37,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:37,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:37,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:37,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:37,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:37,507 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:37,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:37,747 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:50:37,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:37,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:37,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:37,747 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:50:37,747 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:50:37,748 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 [2018-09-23 19:50:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:50:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-23 19:50:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:37,886 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:37,886 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:37,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:37,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:37,886 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:37,886 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:37,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:37,887 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-09-23 19:50:37,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:37,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:37,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:37,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:37,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:37,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:37,950 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 [2018-09-23 19:50:37,959 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:37,968 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:37,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:37,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:37,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:37,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:37,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:37,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:37,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:37,994 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:38,217 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:50:38,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:38,217 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:38,218 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:50:38,218 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:50:38,218 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 [2018-09-23 19:50:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:50:38,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-23 19:50:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:38,345 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-23 19:50:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:38,346 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:38,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:38,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:38,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:38,346 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:38,346 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:38,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:38,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-09-23 19:50:38,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:38,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:38,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:38,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:38,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:38,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:38,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:38,437 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:38,467 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:38,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:38,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:38,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:38,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:38,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:38,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:38,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:38,501 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-23 19:50:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:38,744 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:50:38,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:38,745 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:38,745 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:50:38,745 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:50:38,746 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 [2018-09-23 19:50:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:50:38,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-23 19:50:38,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:38,889 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:38,889 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:38,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:38,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:38,889 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:38,890 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:38,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:38,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-09-23 19:50:38,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:38,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:38,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:38,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:38,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:38,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:38,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:38,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:39,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:39,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:39,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:39,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:39,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:39,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:39,033 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:39,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:39,254 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:50:39,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:39,254 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:39,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:39,254 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:50:39,254 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:50:39,255 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 [2018-09-23 19:50:39,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:50:39,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-23 19:50:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:39,387 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:39,387 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:39,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:39,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:39,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:39,387 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:39,388 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:39,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:39,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-09-23 19:50:39,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:39,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:39,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:39,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:39,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:39,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:39,447 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 [2018-09-23 19:50:39,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:39,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:39,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:39,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:39,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:39,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:39,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:39,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:39,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:39,484 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:39,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:39,699 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-23 19:50:39,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:39,699 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:39,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:39,700 INFO L225 Difference]: With dead ends: 35 [2018-09-23 19:50:39,700 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 19:50:39,700 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 [2018-09-23 19:50:39,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 19:50:39,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-23 19:50:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:39,837 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:39,837 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:39,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:39,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:39,838 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:50:39,838 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:39,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:39,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-09-23 19:50:39,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:39,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:39,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:39,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:39,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:39,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:39,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:39,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:39,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:39,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:39,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:39,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:39,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:39,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:39,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:39,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:39,985 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:40,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:40,172 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-23 19:50:40,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:40,172 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:40,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:40,173 INFO L225 Difference]: With dead ends: 34 [2018-09-23 19:50:40,173 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 19:50:40,173 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 [2018-09-23 19:50:40,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 19:50:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-23 19:50:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:50:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:50:40,262 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-23 19:50:40,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:40,262 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:50:40,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:50:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:40,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:40,262 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:50:40,262 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:40,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:40,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-09-23 19:50:40,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:40,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:40,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:40,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:40,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:40,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:40,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:40,514 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:40,519 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:40,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:40,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:40,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:40,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:40,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:40,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:40,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:40,545 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-23 19:50:40,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:40,915 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:50:40,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:40,915 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:40,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:40,916 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:50:40,916 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:50:40,916 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 [2018-09-23 19:50:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:50:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-23 19:50:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:41,094 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:41,095 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:41,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:41,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:41,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:41,095 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:41,096 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:41,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:41,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-09-23 19:50:41,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:41,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:41,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:41,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:41,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:41,169 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:41,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:41,179 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:41,188 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:41,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:41,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:41,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:41,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:41,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:41,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:41,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:41,214 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:41,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:41,593 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:50:41,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:41,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:41,594 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:50:41,594 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:50:41,594 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 [2018-09-23 19:50:41,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:50:41,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-23 19:50:41,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:41,759 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:41,760 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:41,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:41,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:41,760 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:41,760 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:41,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:41,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-09-23 19:50:41,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:41,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:41,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:41,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:41,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:41,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:41,822 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 [2018-09-23 19:50:41,830 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:41,839 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:41,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:41,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:41,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:41,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:41,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:41,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:41,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:41,870 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:42,248 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:50:42,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:42,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:42,248 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:50:42,249 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:50:42,250 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 [2018-09-23 19:50:42,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:50:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-23 19:50:42,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:42,447 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:42,447 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:42,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:42,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:42,448 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:42,448 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:42,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:42,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-09-23 19:50:42,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:42,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:42,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:42,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:42,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:42,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:42,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:42,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:42,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:42,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:42,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:42,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:42,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:42,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:42,659 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:43,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:43,017 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:50:43,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:43,018 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:43,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:43,018 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:50:43,018 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:50:43,019 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 [2018-09-23 19:50:43,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:50:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-23 19:50:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:43,179 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:43,179 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:43,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:43,179 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:43,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:43,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:43,180 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:43,180 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:43,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:43,180 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-09-23 19:50:43,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:43,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:43,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:43,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:43,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:43,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:43,277 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 [2018-09-23 19:50:43,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:43,291 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:43,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:43,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:43,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:43,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:43,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:43,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:43,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:43,315 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:43,708 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:50:43,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:43,708 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:43,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:43,708 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:50:43,708 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:50:43,708 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 [2018-09-23 19:50:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:50:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-23 19:50:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:43,878 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:43,878 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:43,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:43,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:43,878 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:43,878 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:43,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-09-23 19:50:43,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:43,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:43,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:43,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:43,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:43,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:43,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:43,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:43,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:43,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:43,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:43,958 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:43,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:43,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:43,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:43,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:43,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:43,978 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:44,365 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:50:44,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:44,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:44,365 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:50:44,365 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:50:44,365 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 [2018-09-23 19:50:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:50:44,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-23 19:50:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:44,537 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:44,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:44,537 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:44,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:44,537 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:44,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:44,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:44,537 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:44,538 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:44,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:44,538 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-09-23 19:50:44,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:44,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:44,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:44,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:44,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:44,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:44,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:44,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:44,615 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:44,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:44,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:44,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:44,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:44,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:44,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:44,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:44,638 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:45,011 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:50:45,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:45,011 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:45,012 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:50:45,012 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:50:45,012 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 [2018-09-23 19:50:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:50:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-23 19:50:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:45,188 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:45,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:45,188 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:45,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:45,188 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:45,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:45,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:45,188 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:45,189 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:45,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-09-23 19:50:45,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:45,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:45,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:45,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:45,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:45,257 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:45,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:45,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:45,266 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:45,274 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:45,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:45,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:45,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:45,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:45,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:45,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:45,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:45,299 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:45,645 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:50:45,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:45,645 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:45,646 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:50:45,646 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:50:45,646 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 [2018-09-23 19:50:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:50:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-23 19:50:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:45,785 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-23 19:50:45,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:45,785 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:45,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:45,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:45,786 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:45,786 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:45,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:45,786 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-09-23 19:50:45,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:45,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:45,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:45,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:45,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:46,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:46,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:46,782 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:46,878 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:46,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:46,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:46,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:46,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:46,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:46,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:46,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:46,920 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-23 19:50:47,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:47,504 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:50:47,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:47,504 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:47,505 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:50:47,505 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:50:47,505 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 [2018-09-23 19:50:47,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:50:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-23 19:50:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:47,683 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:47,684 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:47,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:47,684 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:47,684 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:47,684 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:47,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:47,684 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-09-23 19:50:47,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:47,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:47,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:47,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:47,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:47,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:47,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:47,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:47,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:47,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:47,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:47,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:47,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:47,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:47,827 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:48,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:48,267 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:50:48,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:48,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:48,268 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:50:48,268 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:50:48,268 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 [2018-09-23 19:50:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:50:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-23 19:50:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:48,442 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:48,442 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:48,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:48,442 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:48,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:48,442 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:48,443 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:48,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:48,443 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-09-23 19:50:48,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:48,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:48,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:48,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:48,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:48,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:48,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:48,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:48,517 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:48,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:48,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:48,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:48,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:48,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:48,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:48,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:48,542 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:49,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:49,013 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:50:49,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:49,013 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:49,013 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:50:49,013 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:50:49,013 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 [2018-09-23 19:50:49,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:50:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-23 19:50:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:49,189 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:49,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:49,189 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:49,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:49,189 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:49,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:49,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:49,189 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:49,190 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:49,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:49,190 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-09-23 19:50:49,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:49,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:49,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:49,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:49,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:49,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:49,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:49,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:49,266 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:49,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:49,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:49,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:49,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:49,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:49,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:49,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:49,290 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:49,636 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:50:49,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:49,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:49,637 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:50:49,637 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:50:49,637 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 [2018-09-23 19:50:49,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:50:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-23 19:50:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:49,798 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:49,798 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:49,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:49,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:49,799 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:49,799 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:49,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:49,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-09-23 19:50:49,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:49,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:49,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:49,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:49,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:49,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:49,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:49,902 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:49,909 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:49,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:49,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:49,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:49,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:49,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:49,943 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:50,426 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:50:50,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:50,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:50,427 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:50,427 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:50:50,427 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 [2018-09-23 19:50:50,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:50:50,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-23 19:50:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:50,606 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:50,606 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:50,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:50,607 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:50,607 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:50,607 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:50,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-09-23 19:50:50,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:50,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:50,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:50,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:50,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:50,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:50,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:50,678 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:50,686 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:50,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:50,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:50,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:50,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:50,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:50,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:50,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:50,711 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:51,053 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:50:51,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:51,053 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:51,054 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:50:51,054 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:50:51,054 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 [2018-09-23 19:50:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:50:51,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-23 19:50:51,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:51,214 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:51,214 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:51,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:51,215 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:51,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:51,215 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:51,215 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:51,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:51,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-09-23 19:50:51,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:51,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:51,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:51,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:51,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:51,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:51,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:51,352 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:51,361 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:51,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:51,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:51,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:51,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:51,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:51,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:51,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:51,385 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:51,696 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:50:51,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:51,696 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:51,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:51,697 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:50:51,697 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:50:51,697 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 [2018-09-23 19:50:51,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:50:51,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-23 19:50:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:51,904 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:51,904 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:51,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:51,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:51,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:51,905 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:51,905 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:51,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:51,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-09-23 19:50:51,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:51,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:51,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:51,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:51,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:51,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:51,963 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 [2018-09-23 19:50:51,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:51,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:52,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:52,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:52,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:52,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:52,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:52,004 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:52,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:52,326 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:50:52,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:52,326 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:52,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:52,327 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:50:52,327 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:50:52,327 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 [2018-09-23 19:50:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:50:52,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-23 19:50:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:50:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:50:52,453 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-23 19:50:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:52,454 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:50:52,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:50:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:52,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:52,454 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:52,454 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:52,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:52,454 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-09-23 19:50:52,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:52,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:52,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:52,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:52,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:52,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:52,567 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 [2018-09-23 19:50:52,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:52,582 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:52,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:52,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:52,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:52,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:52,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:52,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:52,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:52,605 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-23 19:50:53,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:53,010 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:50:53,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:53,010 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:53,011 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:50:53,011 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:50:53,011 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 [2018-09-23 19:50:53,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:50:53,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-23 19:50:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:53,195 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:53,195 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:53,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:53,195 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:53,195 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:53,195 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:53,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:53,196 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-09-23 19:50:53,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:53,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:53,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:53,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:53,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:53,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:53,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:53,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:53,280 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:53,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:53,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:53,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:53,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:53,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:53,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:53,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:53,305 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:53,721 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:50:53,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:53,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:53,722 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:50:53,722 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:50:53,722 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 [2018-09-23 19:50:53,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:50:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-23 19:50:53,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:53,889 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:53,889 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:53,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:53,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:53,889 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:53,890 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:53,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:53,890 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-09-23 19:50:53,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:53,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:53,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:53,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:53,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:53,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:53,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:53,960 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:53,966 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:53,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:53,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:53,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:53,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:53,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:53,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:53,990 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:54,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:54,398 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:50:54,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:54,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:54,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:54,398 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:50:54,399 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:50:54,399 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 [2018-09-23 19:50:54,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:50:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-23 19:50:54,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:54,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:54,579 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:54,580 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:54,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:54,580 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:54,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:54,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:54,580 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:54,580 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:54,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:54,580 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-09-23 19:50:54,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:54,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:54,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:54,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:54,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:54,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:54,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:54,649 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:54,656 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:54,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:54,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:54,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:54,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:54,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:54,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:54,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:54,681 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:55,066 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:50:55,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:55,066 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:55,067 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:50:55,067 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:50:55,067 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 [2018-09-23 19:50:55,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:50:55,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-23 19:50:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:50:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:50:55,231 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:50:55,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:55,231 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:50:55,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:55,231 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:50:55,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:55,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:55,231 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:55,232 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:55,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:55,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-09-23 19:50:55,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:55,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:55,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:55,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:55,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:55,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:55,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:55,299 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:55,307 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:55,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:55,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:55,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:55,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:55,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:55,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:55,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:55,332 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:50:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:55,751 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:50:55,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:55,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:55,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:55,752 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:50:55,752 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:50:55,752 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 [2018-09-23 19:50:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:50:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-23 19:50:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:55,942 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:55,942 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:55,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:55,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:55,943 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:55,943 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:55,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:55,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-09-23 19:50:55,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:55,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:55,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:55,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:55,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:56,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:56,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:56,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:56,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:56,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:56,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:56,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:56,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:56,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:56,043 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:56,457 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:50:56,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:56,457 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:56,458 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:50:56,458 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:50:56,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:50:56,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-23 19:50:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:56,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:56,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:56,645 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:56,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:56,645 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:56,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:56,646 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:56,646 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:56,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:56,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-09-23 19:50:56,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:56,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:56,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:56,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:50:56,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:56,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:56,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:56,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:50:56,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:50:56,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:56,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:56,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:56,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:56,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:56,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:56,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:56,758 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:57,159 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:50:57,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:57,159 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:57,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:57,160 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:50:57,160 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:50:57,160 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 [2018-09-23 19:50:57,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:50:57,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-23 19:50:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:57,336 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:57,336 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:57,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:57,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:57,336 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:50:57,336 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:57,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:57,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-09-23 19:50:57,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:57,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:57,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:57,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:57,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:57,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:57,396 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 [2018-09-23 19:50:57,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:50:57,413 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:50:57,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:57,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:57,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:57,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:57,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:57,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:57,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:57,437 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:57,817 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:50:57,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:57,817 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:57,817 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:50:57,818 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:50:57,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:57,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:50:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-23 19:50:57,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:50:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:50:57,978 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-23 19:50:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:57,979 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:50:57,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:57,979 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:50:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:57,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:57,979 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:57,979 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:57,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:57,979 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-09-23 19:50:57,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:57,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:57,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:57,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:57,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:58,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:58,061 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:50:58,066 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:50:58,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:58,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:58,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:58,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:58,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:58,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:58,091 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-23 19:50:58,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:58,492 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:50:58,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:58,492 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:58,493 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:50:58,493 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:50:58,493 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 [2018-09-23 19:50:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:50:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-23 19:50:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:50:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:50:58,681 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:50:58,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:58,681 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:50:58,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:50:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:58,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:58,682 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:58,682 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:58,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:58,682 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-09-23 19:50:58,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:58,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:58,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:58,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:58,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:58,742 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:58,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:58,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:50:58,760 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:50:58,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:58,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:58,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:58,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:58,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:58,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:58,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:58,785 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:50:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:59,171 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:50:59,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:59,171 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:59,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:59,171 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:50:59,171 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:50:59,172 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 [2018-09-23 19:50:59,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:50:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-23 19:50:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:50:59,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:50:59,350 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:50:59,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:50:59,350 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:50:59,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:50:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:50:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:50:59,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:50:59,350 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:50:59,351 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:50:59,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:50:59,351 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-09-23 19:50:59,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:50:59,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:50:59,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:59,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:50:59,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:50:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:50:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:59,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:50:59,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:50:59,580 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:50:59,590 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:50:59,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:50:59,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:50:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:50:59,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:50:59,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:50:59,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:50:59,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:50:59,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:50:59,614 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:50:59,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:50:59,992 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:50:59,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:50:59,992 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:50:59,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:50:59,993 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:50:59,993 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:50:59,993 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 [2018-09-23 19:50:59,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:51:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-23 19:51:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:00,189 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:00,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:00,189 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:00,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:00,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:00,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:00,190 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:00,190 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:00,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:00,190 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-09-23 19:51:00,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:00,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:00,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:00,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:00,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:00,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:00,250 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 [2018-09-23 19:51:00,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:00,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:00,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:00,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:00,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:00,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:00,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:00,287 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:00,664 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:51:00,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:00,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:00,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:00,665 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:51:00,665 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:51:00,665 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 [2018-09-23 19:51:00,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:51:00,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-23 19:51:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:51:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:51:00,843 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:51:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:00,843 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:51:00,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:51:00,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:00,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:00,843 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:00,844 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:00,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:00,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-09-23 19:51:00,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:00,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:00,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:00,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:00,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:00,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:00,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:00,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:00,924 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:00,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:00,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:00,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:00,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:00,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:00,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:00,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:00,948 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:51:01,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:01,304 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:51:01,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:01,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:01,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:01,304 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:51:01,304 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:51:01,305 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 [2018-09-23 19:51:01,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:51:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-23 19:51:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:01,495 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:01,495 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:01,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:01,495 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:01,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:01,496 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:01,496 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:01,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:01,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-09-23 19:51:01,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:01,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:01,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:01,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:01,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:01,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:01,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:01,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:01,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:51:01,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:01,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:01,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:01,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:01,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:01,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:01,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:01,622 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:01,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:01,991 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:51:01,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:01,991 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:01,992 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:51:01,992 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:51:01,992 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 [2018-09-23 19:51:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:51:02,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-23 19:51:02,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:02,183 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:51:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:02,183 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:02,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:02,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:02,183 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:02,183 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:02,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:02,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-09-23 19:51:02,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:02,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:02,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:02,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:02,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:02,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:02,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:02,253 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:02,258 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:02,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:02,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:02,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:02,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:02,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:02,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:02,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:02,292 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:51:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:02,641 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:51:02,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:02,641 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:02,642 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:51:02,642 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:51:02,642 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 [2018-09-23 19:51:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:51:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-23 19:51:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:02,842 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:02,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:02,842 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:02,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:02,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:02,842 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:51:02,842 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:02,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:02,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-09-23 19:51:02,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:02,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:02,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:02,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:02,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:02,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:02,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:02,995 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:03,015 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:51:03,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:03,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:03,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:03,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:03,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:03,038 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:03,371 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:51:03,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:03,371 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:03,372 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:51:03,372 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:51:03,372 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 [2018-09-23 19:51:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:51:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-09-23 19:51:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:51:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:51:03,500 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-23 19:51:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:03,500 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:51:03,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:51:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:03,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:03,500 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:03,500 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:03,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-09-23 19:51:03,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:03,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:03,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:03,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:03,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:03,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:03,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:03,573 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:03,581 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:51:03,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:03,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:03,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:03,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:03,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:03,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:03,606 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-23 19:51:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:03,998 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:51:03,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:03,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:03,999 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:51:03,999 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:51:03,999 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 [2018-09-23 19:51:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:51:04,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-23 19:51:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:04,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:04,211 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:04,211 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:04,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:04,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:04,212 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:04,212 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:04,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:04,212 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-09-23 19:51:04,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:04,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:04,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:04,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:04,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:04,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:04,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:04,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:04,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:04,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:04,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:04,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:04,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:04,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:04,316 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:04,724 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:51:04,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:04,724 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:04,725 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:51:04,725 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:51:04,725 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 [2018-09-23 19:51:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:51:04,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-23 19:51:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:04,934 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:51:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:04,934 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:04,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:04,935 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:04,935 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:04,935 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:04,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:04,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-09-23 19:51:04,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:04,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:04,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:04,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:04,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:05,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:05,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:05,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:05,034 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:05,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:05,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:05,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:05,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:05,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:05,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:05,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:05,061 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:51:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:05,461 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:51:05,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:05,461 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:05,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:05,461 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:51:05,461 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:51:05,462 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 [2018-09-23 19:51:05,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:51:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-23 19:51:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:05,660 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:05,660 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:05,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:05,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:05,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:05,660 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:05,660 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:05,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:05,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-09-23 19:51:05,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:05,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:05,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:05,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:05,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:05,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:05,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:05,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:05,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:51:05,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:05,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:05,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:05,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:05,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:05,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:05,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:05,774 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:06,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:06,152 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:51:06,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:06,154 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:06,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:06,154 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:51:06,154 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:51:06,154 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 [2018-09-23 19:51:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:51:06,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-23 19:51:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:51:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:51:06,330 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:51:06,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:06,331 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:51:06,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:06,331 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:51:06,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:06,331 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:06,331 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:06,331 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:06,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-09-23 19:51:06,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:06,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:06,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:06,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:06,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:06,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:06,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:06,409 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:06,415 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:06,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:06,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:06,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:06,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:06,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:06,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:06,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:06,450 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:51:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:06,859 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:51:06,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:06,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:06,859 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:51:06,859 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:51:06,859 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 [2018-09-23 19:51:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:51:07,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-23 19:51:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:07,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:07,077 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:07,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:07,077 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:07,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:07,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:07,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:07,077 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:07,078 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:07,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:07,078 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-09-23 19:51:07,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:07,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:07,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:07,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:07,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:07,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:07,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:07,146 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:07,154 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:51:07,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:07,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:07,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:07,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:07,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:07,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:07,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:07,178 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:07,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:07,552 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:51:07,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:07,552 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:07,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:07,552 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:51:07,552 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:51:07,553 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 [2018-09-23 19:51:07,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:51:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-23 19:51:07,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:07,754 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:51:07,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:07,754 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:07,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:07,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:07,755 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:07,755 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:07,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:07,755 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-09-23 19:51:07,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:07,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:07,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:07,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:07,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:07,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:07,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:07,869 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:07,878 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:51:07,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:07,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:07,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:07,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:07,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:07,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:07,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:07,902 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:51:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:08,257 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:51:08,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:08,257 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:08,257 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:51:08,257 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:51:08,258 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 [2018-09-23 19:51:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:51:08,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-23 19:51:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:08,476 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:08,476 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:08,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:08,476 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:08,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:08,477 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:08,477 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:08,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:08,477 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-09-23 19:51:08,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:08,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:08,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:08,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:08,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:08,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:08,550 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 [2018-09-23 19:51:08,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:08,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:08,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:08,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:08,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:08,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:08,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:08,589 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:08,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:08,939 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:51:08,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:08,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:08,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:08,939 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:51:08,939 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:51:08,939 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 [2018-09-23 19:51:08,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:51:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-23 19:51:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:51:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:51:09,103 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-23 19:51:09,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:09,103 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:51:09,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:09,103 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:51:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:09,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:09,103 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:09,103 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:09,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:09,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-09-23 19:51:09,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:09,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:09,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:09,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:09,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:09,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:09,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:09,173 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:09,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:09,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:09,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:09,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:09,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:09,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:09,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:09,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:09,203 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-23 19:51:09,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:09,662 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:51:09,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:09,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:09,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:09,663 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:51:09,663 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:51:09,663 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 [2018-09-23 19:51:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:51:09,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-23 19:51:09,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:09,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:09,898 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:09,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:09,898 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:09,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:09,898 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:09,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:09,899 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:09,899 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:09,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:09,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-09-23 19:51:09,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:09,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:09,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:09,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:09,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:09,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:09,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:09,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:09,978 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:51:09,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:09,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:10,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:10,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:10,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:10,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:10,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:10,013 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:10,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:10,994 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:51:10,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:10,994 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:10,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:10,994 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:51:10,994 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:51:10,995 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 [2018-09-23 19:51:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:51:11,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-23 19:51:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:11,359 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:51:11,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:11,359 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:11,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:11,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:11,360 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:11,360 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:11,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:11,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-09-23 19:51:11,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:11,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:11,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:11,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:11,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:11,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:11,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:11,551 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:11,556 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:11,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:11,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:11,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:11,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:11,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:11,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:11,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:11,581 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:51:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:11,990 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:51:11,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:11,990 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:11,991 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:51:11,991 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:51:11,991 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 [2018-09-23 19:51:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:51:12,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-23 19:51:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:12,209 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:12,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:12,209 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:12,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:12,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:12,210 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:12,210 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:12,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:12,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-09-23 19:51:12,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:12,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:12,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:12,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:12,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:12,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:12,270 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 [2018-09-23 19:51:12,277 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:12,285 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:51:12,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:12,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:12,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:12,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:12,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:12,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:12,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:12,310 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:12,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:12,720 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:51:12,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:12,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:12,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:12,720 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:51:12,720 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:51:12,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:51:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-23 19:51:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:51:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:51:12,925 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:51:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:12,925 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:51:12,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:12,925 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:51:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:12,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:12,926 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:12,926 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:12,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:12,926 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-09-23 19:51:12,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:12,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:12,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:12,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:12,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:13,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:13,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:13,050 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:13,065 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:51:13,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:13,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:13,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:13,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:13,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:13,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:13,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:13,090 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:51:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:13,478 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:51:13,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:13,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:13,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:13,479 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:51:13,479 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:51:13,479 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 [2018-09-23 19:51:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:51:13,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-23 19:51:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:13,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:13,702 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:13,702 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:13,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:13,702 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:13,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:13,702 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:13,702 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:13,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:13,702 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-09-23 19:51:13,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:13,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:13,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:13,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:13,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:14,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:14,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:14,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:14,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:14,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:14,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:14,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:14,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:14,774 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:15,391 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:51:15,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:15,391 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:15,392 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:51:15,392 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:51:15,392 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 [2018-09-23 19:51:15,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:51:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-23 19:51:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:15,598 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:51:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:15,598 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:15,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:15,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:15,599 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:15,599 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:15,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:15,599 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-09-23 19:51:15,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:15,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:15,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:15,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:15,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:15,662 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:15,662 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:15,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:15,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:15,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:15,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:15,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:15,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:15,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:15,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:15,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:15,699 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:51:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:16,061 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:51:16,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:16,061 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:16,062 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:51:16,062 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:51:16,062 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 [2018-09-23 19:51:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:51:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-23 19:51:16,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:16,267 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:16,267 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:16,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:16,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:16,268 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:51:16,268 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:16,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:16,268 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-09-23 19:51:16,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:16,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:16,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:16,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:16,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:16,328 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:16,328 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:16,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:16,346 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:51:16,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:16,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:16,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:16,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:16,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:16,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:16,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:16,370 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:16,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:16,712 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:51:16,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:16,712 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:16,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:16,713 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:51:16,713 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:51:16,713 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 [2018-09-23 19:51:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:51:16,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-09-23 19:51:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:51:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:51:16,869 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-23 19:51:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:16,870 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:51:16,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:51:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:16,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:16,870 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:16,870 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:16,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:16,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-09-23 19:51:16,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:16,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:16,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:16,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:16,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:16,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:16,933 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 [2018-09-23 19:51:16,941 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:16,946 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:16,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:16,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:16,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:16,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:16,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:16,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:16,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:16,970 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-23 19:51:17,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:17,337 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:51:17,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:17,337 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:17,338 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:51:17,338 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:51:17,338 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 [2018-09-23 19:51:17,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:51:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-23 19:51:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:17,569 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:17,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:17,569 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:17,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:17,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:17,570 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:17,570 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:17,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:17,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-09-23 19:51:17,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:17,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:17,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:17,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:17,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:17,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:17,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:17,643 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:17,651 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:51:17,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:17,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:17,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:17,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:17,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:17,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:17,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:17,673 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:18,053 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:51:18,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:18,053 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:18,053 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:51:18,053 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:51:18,053 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 [2018-09-23 19:51:18,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:51:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-23 19:51:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:18,269 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:51:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:18,269 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:18,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:18,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:18,270 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:18,270 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:18,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:18,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-09-23 19:51:18,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:18,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:18,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:18,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:18,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:18,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:18,330 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 [2018-09-23 19:51:18,338 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:18,353 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:51:18,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:18,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:18,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:18,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:18,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:18,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:18,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:18,377 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:51:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:18,730 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:51:18,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:18,730 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:18,731 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:51:18,731 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:51:18,731 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 [2018-09-23 19:51:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:51:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-23 19:51:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:18,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:18,951 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:18,952 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:18,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:18,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:18,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:18,952 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:18,952 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:18,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:18,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-09-23 19:51:18,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:18,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:18,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:18,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:18,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:19,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:19,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:19,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:19,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:19,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:19,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:19,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:19,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:19,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:19,053 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:19,422 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:51:19,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:19,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:19,423 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:51:19,423 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:51:19,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:19,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:51:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-23 19:51:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:51:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:51:19,628 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:51:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:19,628 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:51:19,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:51:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:19,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:19,629 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:19,629 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:19,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:19,629 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-09-23 19:51:19,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:19,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:19,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:19,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:19,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:19,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:19,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:19,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:19,708 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:19,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:19,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:19,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:19,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:19,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:19,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:19,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:19,732 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:51:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:20,102 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:51:20,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:20,102 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:20,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:20,102 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:51:20,102 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:51:20,103 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 [2018-09-23 19:51:20,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:51:20,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-23 19:51:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:20,313 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:20,313 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:20,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:20,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:20,313 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:20,314 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:20,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:20,314 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-09-23 19:51:20,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:20,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:20,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:20,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:20,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:20,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:20,377 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 [2018-09-23 19:51:20,385 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:20,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:51:20,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:20,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:20,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:20,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:20,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:20,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:20,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:20,439 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:20,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:20,903 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:51:20,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:20,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:20,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:20,904 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:51:20,904 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:51:20,904 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 [2018-09-23 19:51:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:51:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-23 19:51:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:21,127 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:51:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:21,128 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:21,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:21,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:21,128 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:21,128 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:21,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-09-23 19:51:21,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:21,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:21,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:21,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:21,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:21,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:21,194 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 [2018-09-23 19:51:21,204 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:21,209 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:21,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:21,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:21,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:21,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:21,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:21,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:21,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:21,233 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:51:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:21,593 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:51:21,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:21,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:21,594 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:51:21,594 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:51:21,594 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 [2018-09-23 19:51:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:51:21,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-23 19:51:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:21,802 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:21,802 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:21,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:21,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:21,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:21,802 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:51:21,803 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:21,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:21,803 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-09-23 19:51:21,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:21,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:21,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:21,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:21,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:21,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:21,879 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 [2018-09-23 19:51:21,887 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:21,895 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:51:21,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:21,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:21,920 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:21,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:21,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:21,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:21,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:21,921 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:22,262 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:51:22,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:22,262 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:22,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:22,263 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:51:22,263 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:51:22,263 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 [2018-09-23 19:51:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:51:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-23 19:51:22,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:51:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:51:22,444 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-23 19:51:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:22,444 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:51:22,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:22,444 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:51:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:22,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:22,444 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-23 19:51:22,444 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:22,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:22,445 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-09-23 19:51:22,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:22,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:22,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:22,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:22,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:22,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:22,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:22,519 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:22,530 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:51:22,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:22,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:22,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:22,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:22,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:22,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:22,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:22,554 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-23 19:51:22,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:22,904 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:51:22,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:22,904 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:22,904 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:51:22,904 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:51:22,904 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 [2018-09-23 19:51:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:51:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-23 19:51:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:23,143 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:23,143 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:23,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:23,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:23,144 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:23,144 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:23,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:23,144 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-09-23 19:51:23,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:23,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:23,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:23,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:23,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:23,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:23,226 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 [2018-09-23 19:51:23,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:23,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:23,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:23,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:23,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:23,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:23,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:23,261 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:23,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:23,576 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:51:23,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:23,576 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:23,576 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:51:23,577 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:51:23,577 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 [2018-09-23 19:51:23,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:51:23,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-23 19:51:23,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:23,788 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:51:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:23,788 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:23,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:23,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:23,789 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:23,789 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:23,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:23,789 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-09-23 19:51:23,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:23,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:23,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:23,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:23,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:23,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:23,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:23,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:23,934 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:23,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:23,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:23,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:23,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:23,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:23,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:23,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:23,970 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:51:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:24,349 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:51:24,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:24,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:24,350 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:51:24,350 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:51:24,350 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 [2018-09-23 19:51:24,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:51:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-23 19:51:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:24,562 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:24,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:24,563 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:24,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:24,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:24,563 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:51:24,563 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:24,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:24,563 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-09-23 19:51:24,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:24,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:24,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:24,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:24,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:24,624 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:24,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:24,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:24,642 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-23 19:51:24,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:24,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:24,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:24,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:24,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:24,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:24,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:24,666 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:25,000 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:51:25,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:25,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:25,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:25,001 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:51:25,001 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:51:25,001 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 [2018-09-23 19:51:25,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:51:25,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-23 19:51:25,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:51:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:51:25,218 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-23 19:51:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:25,218 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:51:25,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:51:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:25,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:25,218 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-23 19:51:25,218 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:25,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:25,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-09-23 19:51:25,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:25,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:25,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:25,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:25,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:25,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:25,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:25,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:25,298 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:25,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:25,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:25,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:25,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:25,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:25,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:25,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:25,321 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-23 19:51:25,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:25,627 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:51:25,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:25,627 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:25,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:25,628 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:51:25,628 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:51:25,628 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 [2018-09-23 19:51:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:51:25,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-09-23 19:51:25,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:25,865 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:25,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:25,865 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:25,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:25,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:25,866 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:51:25,866 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:25,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:25,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-09-23 19:51:25,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:25,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:25,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:25,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:25,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:25,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:25,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:25,937 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:25,945 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-23 19:51:25,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:25,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:25,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:25,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:25,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:25,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:25,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:25,969 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:26,280 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:51:26,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:26,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:26,281 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:51:26,281 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:51:26,281 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 [2018-09-23 19:51:26,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:51:26,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-09-23 19:51:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:26,504 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-23 19:51:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:26,505 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:26,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:26,505 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:26,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:26,505 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-23 19:51:26,505 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:26,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:26,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-09-23 19:51:26,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:26,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:26,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:26,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:26,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:26,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:26,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:26,573 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:26,584 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 19:51:26,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:26,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:26,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:26,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:26,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:26,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:26,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:26,608 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-23 19:51:26,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:26,903 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-23 19:51:26,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:26,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:26,904 INFO L225 Difference]: With dead ends: 37 [2018-09-23 19:51:26,904 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:51:26,904 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 [2018-09-23 19:51:26,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:51:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-09-23 19:51:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:27,137 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-23 19:51:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:27,137 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:27,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 19:51:27,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:27,137 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-23 19:51:27,137 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:27,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:27,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-09-23 19:51:27,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:27,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:27,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:27,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:27,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:28,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:28,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:28,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:28,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:28,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:28,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:51:28,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:51:28,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:51:28,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:51:28,155 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-23 19:51:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:28,641 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-09-23 19:51:28,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:51:28,641 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-23 19:51:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:28,642 INFO L225 Difference]: With dead ends: 36 [2018-09-23 19:51:28,642 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 19:51:28,642 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 [2018-09-23 19:51:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 19:51:28,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-09-23 19:51:28,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 19:51:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-23 19:51:28,787 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-23 19:51:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:28,787 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-23 19:51:28,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:51:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-23 19:51:28,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:28,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:28,788 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-09-23 19:51:28,788 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:28,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:28,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-09-23 19:51:28,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:28,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:28,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:28,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:28,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:28,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:28,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-23 19:51:28,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:51:28,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:28,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:28,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:28,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:28,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:28,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:28,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:28,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:28,911 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-09-23 19:51:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:29,492 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:51:29,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:29,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:29,493 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:51:29,493 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:51:29,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:29,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:51:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-23 19:51:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:29,775 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:29,775 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:29,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:29,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:29,776 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-23 19:51:29,776 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:29,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:29,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-09-23 19:51:29,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:29,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:29,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:29,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:29,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:29,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:29,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:29,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:29,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:29,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:29,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:29,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:29,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:29,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:29,896 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:30,480 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:51:30,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:30,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:30,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:30,481 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:51:30,481 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:51:30,481 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 [2018-09-23 19:51:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:51:30,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-23 19:51:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:30,774 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:51:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:30,775 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:30,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:30,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:30,775 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-23 19:51:30,775 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:30,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:30,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-09-23 19:51:30,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:30,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:30,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:30,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:30,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:30,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:30,848 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 [2018-09-23 19:51:30,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:30,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:30,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:30,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:30,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:30,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:30,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:30,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:30,887 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:51:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:31,441 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:51:31,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:31,441 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:31,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:31,442 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:51:31,442 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:51:31,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:51:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-23 19:51:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:31,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:31,744 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:31,744 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:31,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:31,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:31,744 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:31,745 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:51:31,745 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:31,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:31,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-09-23 19:51:31,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:31,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:31,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:31,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:31,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:31,822 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:31,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:31,823 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 [2018-09-23 19:51:31,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:31,842 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:51:31,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:31,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:31,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:31,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:31,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:31,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:31,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:31,867 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:32,405 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:51:32,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:32,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:32,405 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:51:32,405 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:51:32,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:51:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-23 19:51:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:32,665 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:51:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:32,665 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:32,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:32,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:32,665 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-23 19:51:32,665 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:32,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-09-23 19:51:32,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:32,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:32,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:32,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:32,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:32,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:32,744 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 [2018-09-23 19:51:32,754 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:32,759 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:32,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:32,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:32,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:32,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:32,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:32,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:32,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:32,784 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:51:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:33,367 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:51:33,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:33,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:33,368 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:51:33,368 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:51:33,368 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 [2018-09-23 19:51:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:51:33,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-23 19:51:33,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:33,665 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:33,665 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:33,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:33,666 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:33,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:33,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:33,666 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:51:33,666 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:33,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:33,666 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-09-23 19:51:33,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:33,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:33,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:33,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:33,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:33,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:33,810 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 [2018-09-23 19:51:33,817 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:33,831 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:51:33,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:33,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:33,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:33,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:33,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:33,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:33,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:33,854 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:34,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:34,463 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:51:34,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:34,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:34,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:34,464 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:51:34,464 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:51:34,464 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 [2018-09-23 19:51:34,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:51:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-23 19:51:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:34,757 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:51:34,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:34,757 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:34,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:34,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:34,758 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:51:34,758 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:34,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:34,758 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-09-23 19:51:34,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:34,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:34,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:34,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:34,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:34,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:34,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:34,830 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 [2018-09-23 19:51:34,836 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:34,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:51:34,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:34,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:34,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:34,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:34,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:34,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:34,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:34,871 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:51:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:35,450 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:51:35,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:35,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:35,451 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:51:35,451 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:51:35,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:51:35,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-23 19:51:35,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:35,739 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:35,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:35,739 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:35,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:35,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:35,740 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:51:35,740 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:35,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:35,740 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-09-23 19:51:35,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:35,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:35,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:35,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:35,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:35,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:35,848 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 [2018-09-23 19:51:35,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:35,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:35,868 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:35,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:35,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:35,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:35,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:35,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:35,888 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:36,436 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:51:36,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:36,436 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:36,437 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:51:36,437 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:51:36,437 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 [2018-09-23 19:51:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:51:36,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-23 19:51:36,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:51:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:51:36,685 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-23 19:51:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:36,685 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:51:36,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:51:36,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:36,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:36,685 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-23 19:51:36,686 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:36,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-09-23 19:51:36,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:36,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:36,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:36,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:36,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:36,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:36,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:36,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:36,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:36,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:36,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:36,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:36,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:36,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:36,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:36,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:36,801 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-23 19:51:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:37,362 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:51:37,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:37,362 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:37,362 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:51:37,362 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:51:37,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:37,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:51:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-23 19:51:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:37,634 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:37,634 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:37,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:37,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:37,634 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:51:37,634 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:37,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:37,635 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-09-23 19:51:37,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:37,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:37,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:37,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:37,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:37,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:37,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:37,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:37,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:51:37,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:37,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:37,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:37,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:37,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:37,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:37,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:37,757 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:38,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:38,302 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:51:38,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:38,302 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:38,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:38,303 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:51:38,303 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:51:38,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:38,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:51:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-23 19:51:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:38,589 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:51:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:38,590 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:38,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:38,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:38,590 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:51:38,590 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:38,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:38,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-09-23 19:51:38,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:38,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:38,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:38,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:38,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:38,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:38,667 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 [2018-09-23 19:51:38,675 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:38,682 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:38,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:38,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:38,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:38,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:38,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:38,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:38,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:38,705 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:51:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:39,240 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:51:39,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:39,240 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:39,241 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:51:39,241 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:51:39,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:51:39,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-23 19:51:39,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:39,525 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:39,525 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:39,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:39,526 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:39,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:39,526 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:51:39,526 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:39,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:39,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-09-23 19:51:39,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:39,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:39,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:39,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:39,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:39,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:39,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:39,603 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:39,613 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:51:39,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:39,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:39,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:39,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:39,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:39,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:39,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:39,637 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:40,159 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:51:40,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:40,159 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:40,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:40,159 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:51:40,159 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:51:40,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:51:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-23 19:51:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:40,422 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:51:40,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:40,423 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:40,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:40,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:40,423 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:51:40,423 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:40,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:40,423 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-09-23 19:51:40,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:40,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:40,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:40,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:40,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:40,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:40,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:40,501 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:40,511 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:51:40,511 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:40,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:40,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:40,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:40,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:40,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:40,535 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:51:41,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:41,043 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:51:41,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:41,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:41,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:41,044 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:51:41,044 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:51:41,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:51:41,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-23 19:51:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:41,349 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:41,349 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:41,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:41,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:41,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:41,349 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:51:41,349 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:41,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:41,349 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-09-23 19:51:41,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:41,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:41,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:41,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:41,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:41,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:41,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:41,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:41,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:41,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:41,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:41,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:41,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:41,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:41,468 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:41,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:41,970 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:51:41,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:41,970 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:41,971 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:51:41,971 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:51:41,971 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 [2018-09-23 19:51:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:51:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-23 19:51:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:42,261 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:51:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:42,261 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:42,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:42,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:42,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:42,261 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:51:42,262 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:42,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:42,262 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-09-23 19:51:42,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:42,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:42,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:42,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:42,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:42,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:42,330 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 [2018-09-23 19:51:42,337 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:42,343 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:42,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:42,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:42,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:42,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:42,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:42,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:42,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:42,377 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:51:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:42,894 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:51:42,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:42,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:42,895 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:51:42,895 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:51:42,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:51:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-23 19:51:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:43,196 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:43,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:43,196 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:43,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:43,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:43,196 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:51:43,196 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:43,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-09-23 19:51:43,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:43,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:43,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:43,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:43,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:43,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:43,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:43,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:43,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:51:43,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:43,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:43,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:43,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:43,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:43,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:43,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:43,315 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:43,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:43,771 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:51:43,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:43,771 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:43,771 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:51:43,772 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:51:43,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:51:44,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-23 19:51:44,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:51:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:51:44,060 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-23 19:51:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:44,060 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:51:44,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:51:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:44,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:44,061 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-23 19:51:44,061 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:44,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:44,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-09-23 19:51:44,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:44,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:44,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:44,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:44,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:44,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:44,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:44,157 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:44,164 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:44,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:44,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:44,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:44,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:44,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:44,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:44,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:44,186 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-23 19:51:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:44,811 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:51:44,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:44,811 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:44,812 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:51:44,812 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:51:44,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:51:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-23 19:51:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:45,116 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:45,116 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:45,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:45,116 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:45,116 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:51:45,116 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:45,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:45,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-09-23 19:51:45,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:45,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:45,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:45,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:45,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:45,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:45,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:45,194 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:45,204 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:51:45,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:45,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:45,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:45,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:45,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:45,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:45,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:45,228 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:45,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:45,843 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:51:45,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:45,843 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:45,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:45,844 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:51:45,844 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:51:45,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:45,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:51:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-23 19:51:46,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:46,148 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:51:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:46,148 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:46,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:46,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:46,148 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:51:46,148 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:46,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:46,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-09-23 19:51:46,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:46,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:46,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:46,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:46,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:46,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:46,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:46,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:46,231 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:46,241 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:51:46,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:46,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:46,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:46,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:46,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:46,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:46,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:46,265 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:51:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:46,881 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:51:46,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:46,881 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:46,881 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:51:46,881 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:51:46,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:51:47,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-23 19:51:47,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:47,180 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:47,180 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:47,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:47,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:47,181 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:51:47,181 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:47,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:47,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-09-23 19:51:47,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:47,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:47,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:47,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:47,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:47,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:47,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:47,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:47,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:47,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:47,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:47,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:47,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:47,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:47,296 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:47,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:47,866 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:51:47,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:47,866 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:47,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:47,867 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:51:47,867 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:51:47,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:47,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:51:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-23 19:51:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:48,140 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:51:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:48,140 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:48,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:48,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:48,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:48,140 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:51:48,140 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:48,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:48,141 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-09-23 19:51:48,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:48,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:48,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:48,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:48,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:48,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:48,211 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 [2018-09-23 19:51:48,218 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:48,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:48,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:48,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:48,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:48,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:48,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:48,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:48,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:48,249 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:51:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:48,858 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:51:48,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:48,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:48,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:48,858 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:51:48,859 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:51:48,859 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 [2018-09-23 19:51:48,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:51:49,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-23 19:51:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:49,166 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:49,167 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:49,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:49,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:49,167 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:51:49,167 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:49,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:49,167 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-09-23 19:51:49,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:49,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:49,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:49,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:49,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:49,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:49,275 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 [2018-09-23 19:51:49,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:49,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:51:49,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:49,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:49,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:49,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:49,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:49,319 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:49,925 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:51:49,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:49,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:49,926 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:51:49,926 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:51:49,926 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 [2018-09-23 19:51:49,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:51:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-23 19:51:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:50,216 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:51:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:50,216 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:50,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:50,216 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:50,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:50,217 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:51:50,217 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:50,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:50,217 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-09-23 19:51:50,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:50,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:50,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:50,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:50,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:50,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:50,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:50,297 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:50,304 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:50,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:50,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:50,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:50,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:50,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:50,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:50,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:50,328 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:51:50,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:50,900 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:51:50,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:50,900 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:50,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:50,901 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:51:50,901 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:51:50,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:51:51,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-23 19:51:51,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:51,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:51,188 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:51,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:51,188 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:51,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:51,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:51,189 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:51:51,189 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:51,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-09-23 19:51:51,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:51,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:51,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:51,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:51,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:51,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:51,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:51,268 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:51,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:51:51,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:51,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:51,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:51,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:51,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:51,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:51,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:51,301 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:51,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:51,865 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:51:51,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:51,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:51,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:51,866 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:51:51,866 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:51:51,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:51:52,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-23 19:51:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:51:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:51:52,129 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-23 19:51:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:52,129 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:51:52,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:52,129 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:51:52,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:52,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:52,130 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:51:52,130 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:52,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:52,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-09-23 19:51:52,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:52,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:52,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:52,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:52,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:52,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:52,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:52,208 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:52,217 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:51:52,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:52,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:52,221 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:52,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:52,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:52,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:52,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:52,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:52,241 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-23 19:51:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:52,812 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:51:52,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:52,812 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:52,813 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:51:52,813 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:51:52,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:52,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:51:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-23 19:51:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:53,128 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:53,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:53,128 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:53,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:53,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:53,129 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:51:53,129 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:53,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:53,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-09-23 19:51:53,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:53,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:53,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:53,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:53,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:53,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:53,427 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 [2018-09-23 19:51:53,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:53,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:53,443 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:53,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:53,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:53,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:53,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:53,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:53,464 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:54,019 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:51:54,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:54,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:54,019 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:51:54,019 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:51:54,019 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 [2018-09-23 19:51:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:51:54,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-23 19:51:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:54,312 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:51:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:54,312 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:54,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:54,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:54,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:54,312 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:51:54,313 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:54,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:54,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-09-23 19:51:54,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:54,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:54,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:54,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:54,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:54,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:54,395 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 [2018-09-23 19:51:54,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:51:54,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:51:54,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:54,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:54,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:54,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:54,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:54,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:54,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:54,432 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:51:55,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:55,026 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:51:55,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:55,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:55,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:55,026 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:51:55,026 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:51:55,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:55,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:51:55,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-23 19:51:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:55,326 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:55,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:55,326 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:55,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:55,326 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:55,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:55,326 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:51:55,327 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:55,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:55,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-09-23 19:51:55,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:55,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:55,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:55,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:55,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:55,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:55,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:55,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:51:55,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:51:55,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:55,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:55,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:55,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:55,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:55,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:55,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:55,470 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:56,033 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:51:56,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:56,033 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:56,034 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:51:56,034 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:51:56,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:51:56,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-23 19:51:56,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:51:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:51:56,309 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:51:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:56,309 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:51:56,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:51:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:56,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:56,309 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:51:56,310 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:56,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:56,310 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-09-23 19:51:56,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:56,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:56,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:56,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:56,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:56,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:56,398 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 [2018-09-23 19:51:56,407 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:51:56,414 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:51:56,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:56,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:56,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:56,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:56,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:56,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:56,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:56,438 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:51:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:56,963 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:51:56,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:56,963 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:56,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:56,964 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:51:56,964 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:51:56,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:51:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-23 19:51:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:57,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:57,289 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:57,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:57,289 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:57,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:57,289 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:57,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:57,289 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:51:57,290 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:57,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:57,290 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-09-23 19:51:57,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:57,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:57,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:57,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:57,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:57,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:57,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:57,367 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:51:57,374 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:51:57,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:57,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:57,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:57,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:57,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:57,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:57,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:57,398 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:57,936 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:51:57,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:57,936 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:57,937 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:51:57,937 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:51:57,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:57,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:51:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-23 19:51:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:51:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:51:58,240 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:51:58,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:58,240 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:51:58,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:58,240 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:51:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:58,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:58,240 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:51:58,241 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:58,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:58,241 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-09-23 19:51:58,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:58,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:58,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:58,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:58,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:58,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:58,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:51:58,320 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:51:58,329 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:51:58,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:51:58,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:58,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:58,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:58,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:58,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:58,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:58,352 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:51:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:58,850 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:51:58,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:58,850 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:58,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:58,851 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:51:58,851 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:51:58,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:51:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-23 19:51:59,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:51:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:51:59,173 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:51:59,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:59,173 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:51:59,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:51:59,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:59,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:59,174 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:51:59,174 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:59,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:59,174 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-09-23 19:51:59,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:59,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:59,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:59,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:51:59,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:59,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:51:59,296 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 [2018-09-23 19:51:59,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:51:59,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:51:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:51:59,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:51:59,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:51:59,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:51:59,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:51:59,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:51:59,331 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:51:59,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:51:59,801 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:51:59,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:51:59,801 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:51:59,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:51:59,802 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:51:59,802 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:51:59,802 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 [2018-09-23 19:51:59,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:51:59,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-23 19:51:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:51:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:51:59,996 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-23 19:51:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:51:59,996 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:51:59,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:51:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:51:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:51:59,996 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:51:59,996 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-23 19:51:59,996 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:51:59,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:51:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-09-23 19:51:59,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:51:59,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:51:59,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:59,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:51:59,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:51:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:00,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:00,064 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 [2018-09-23 19:52:00,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:00,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:00,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:00,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:00,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:00,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:00,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:00,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:00,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:00,103 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-23 19:52:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:00,678 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:52:00,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:00,678 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:00,678 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:52:00,678 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:52:00,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:52:01,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-23 19:52:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:01,006 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:01,006 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:01,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:01,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:01,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:01,007 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:52:01,007 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:01,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:01,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-09-23 19:52:01,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:01,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:01,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:01,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:01,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:01,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:01,081 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 [2018-09-23 19:52:01,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:01,102 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:52:01,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:01,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:01,126 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:01,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:01,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:01,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:01,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:01,127 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:01,659 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:52:01,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:01,659 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:01,660 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:52:01,660 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:52:01,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:52:01,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-23 19:52:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:01,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:01,978 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:01,978 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:01,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:01,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:01,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:01,978 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:52:01,978 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:01,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:01,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-09-23 19:52:01,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:01,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:01,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:01,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:01,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:02,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:02,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:02,071 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:02,077 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:02,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:02,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:02,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:02,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:02,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:02,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:02,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:02,110 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:02,782 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:52:02,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:02,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:02,782 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:52:02,782 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:52:02,782 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 [2018-09-23 19:52:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:52:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-23 19:52:03,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:03,106 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:03,106 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:03,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:03,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:03,107 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:03,107 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:03,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-09-23 19:52:03,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:03,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:03,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:03,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:03,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:03,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:03,178 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 [2018-09-23 19:52:03,186 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:03,198 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:52:03,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:03,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:03,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:03,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:03,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:03,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:03,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:03,222 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:03,798 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:52:03,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:03,798 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:03,799 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:52:03,799 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:52:03,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:52:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-23 19:52:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:52:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:52:04,089 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:52:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:04,089 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:52:04,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:52:04,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:04,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:04,089 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:52:04,090 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:04,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:04,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-09-23 19:52:04,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:04,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:04,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:04,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:04,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:04,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:04,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:04,175 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:04,185 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:52:04,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:04,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:04,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:04,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:04,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:04,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:04,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:04,209 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:52:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:04,731 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:52:04,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:04,731 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:04,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:04,732 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:52:04,732 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:52:04,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:52:05,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-23 19:52:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:05,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:05,076 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:05,077 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:05,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:05,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:05,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:05,077 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:05,077 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:05,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:05,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-09-23 19:52:05,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:05,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:05,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:05,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:05,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:05,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:05,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:05,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:05,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:05,202 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:05,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:05,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:05,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:05,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:05,203 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:05,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:05,737 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:52:05,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:05,737 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:05,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:05,737 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:52:05,737 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:52:05,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:05,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:52:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-23 19:52:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:06,108 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:06,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:06,108 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:06,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:06,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:06,108 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:06,108 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:06,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:06,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-09-23 19:52:06,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:06,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:06,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:06,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:06,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:06,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:06,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:06,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:06,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:06,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:06,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:06,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:06,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:06,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:06,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:06,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:06,211 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:06,732 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:52:06,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:06,732 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:06,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:06,733 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:52:06,733 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:52:06,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:52:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-23 19:52:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:07,059 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:07,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:07,059 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:07,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:07,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:07,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:07,060 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:07,060 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:07,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:07,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-09-23 19:52:07,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:07,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:07,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:07,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:07,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:07,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:07,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:07,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:07,146 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:52:07,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:07,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:07,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:07,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:07,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:07,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:07,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:07,170 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:07,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:07,657 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:52:07,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:07,657 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:07,658 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:52:07,658 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:52:07,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:52:07,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-23 19:52:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:52:07,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:52:07,936 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-23 19:52:07,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:07,936 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:52:07,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:52:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:07,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:07,936 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:52:07,936 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:07,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:07,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-09-23 19:52:07,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:07,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:07,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:07,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:07,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:08,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:08,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:08,011 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:08,017 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:08,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:08,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:08,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:08,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:08,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:08,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:08,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:08,041 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-23 19:52:08,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:08,649 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:52:08,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:08,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:08,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:08,650 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:52:08,650 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:52:08,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:08,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:52:08,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-23 19:52:08,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:08,967 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:08,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:08,967 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:08,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:08,967 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:08,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:08,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:08,968 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:08,968 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:08,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:08,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-09-23 19:52:08,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:08,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:08,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:08,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:08,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:09,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:09,035 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 [2018-09-23 19:52:09,043 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:09,054 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:52:09,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:09,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:09,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:09,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:09,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:09,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:09,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:09,078 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:09,649 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:52:09,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:09,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:09,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:09,649 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:52:09,650 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:52:09,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:09,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:52:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-23 19:52:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:09,968 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:09,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:09,968 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:09,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:09,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:09,969 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:09,969 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:09,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:09,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-09-23 19:52:09,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:09,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:09,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:09,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:09,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:10,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:10,045 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 [2018-09-23 19:52:10,054 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:10,063 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:52:10,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:10,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:10,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:10,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:10,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:10,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:10,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:10,097 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:11,160 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:52:11,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:11,160 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:11,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:11,161 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:52:11,161 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:52:11,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:52:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-23 19:52:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:11,504 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:11,504 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:11,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:11,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:11,504 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:11,504 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:11,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:11,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-09-23 19:52:11,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:11,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:11,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:11,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:11,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:11,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:11,578 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 [2018-09-23 19:52:11,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:11,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:11,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:11,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:11,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:11,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:11,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:11,612 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:12,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:12,181 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:52:12,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:12,181 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:12,182 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:52:12,182 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:52:12,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:52:12,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-23 19:52:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:52:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:52:12,550 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:52:12,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:12,550 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:52:12,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:52:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:12,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:12,550 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:12,550 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:12,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:12,550 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-09-23 19:52:12,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:12,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:12,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:12,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:12,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:12,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:12,617 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 [2018-09-23 19:52:12,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:12,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:12,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:12,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:12,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:12,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:12,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:12,657 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:52:13,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:13,201 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:52:13,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:13,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:13,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:13,202 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:52:13,202 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:52:13,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:13,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:52:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-23 19:52:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:13,530 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:13,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:13,530 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:13,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:13,530 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:13,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:13,530 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:13,531 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:13,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:13,531 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-09-23 19:52:13,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:13,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:13,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:13,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:13,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:13,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:13,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:13,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:13,622 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:52:13,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:13,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:13,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:13,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:13,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:13,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:13,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:13,646 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:14,197 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:52:14,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:14,197 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:14,198 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:52:14,198 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:52:14,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:14,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:52:14,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-23 19:52:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:14,533 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:14,533 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:14,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:14,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:14,534 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:14,534 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:14,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:14,534 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-09-23 19:52:14,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:14,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:14,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:14,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:14,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:14,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:14,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:14,653 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:14,659 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:14,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:14,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:14,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:14,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:14,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:14,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:14,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:14,683 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:15,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:15,213 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:52:15,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:15,213 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:15,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:15,214 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:52:15,214 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:52:15,214 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 [2018-09-23 19:52:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:52:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-23 19:52:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:15,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:15,527 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:15,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:15,527 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:15,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:15,527 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:15,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:15,527 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:15,527 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:15,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:15,527 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-09-23 19:52:15,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:15,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:15,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:15,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:15,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:15,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:15,596 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 [2018-09-23 19:52:15,603 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:15,614 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:52:15,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:15,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:15,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:15,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:15,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:15,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:15,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:15,639 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:16,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:16,177 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:52:16,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:16,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:16,178 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:52:16,178 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:52:16,178 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 [2018-09-23 19:52:16,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:52:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-23 19:52:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:52:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:52:16,414 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-23 19:52:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:16,414 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:52:16,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:52:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:16,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:16,415 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:52:16,415 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:16,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:16,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-09-23 19:52:16,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:16,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:16,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:16,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:16,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:16,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:16,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:16,493 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:16,503 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:52:16,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:16,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:16,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:16,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:16,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:16,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:16,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:16,527 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-23 19:52:17,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:17,047 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:52:17,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:17,047 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:17,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:17,048 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:52:17,048 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:52:17,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:17,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:52:17,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-23 19:52:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:17,385 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:17,385 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:17,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:17,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:17,386 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:17,386 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:17,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:17,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-09-23 19:52:17,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:17,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:17,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:17,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:17,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:17,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:17,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:17,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:17,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:17,489 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:17,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:17,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:17,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:17,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:17,490 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:18,034 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:52:18,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:18,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:18,034 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:52:18,034 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:52:18,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:18,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:52:18,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-23 19:52:18,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:18,363 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:18,363 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:18,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:18,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:18,363 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:18,364 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:18,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:18,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-09-23 19:52:18,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:18,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:18,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:18,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:18,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:18,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:18,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:18,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:18,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:18,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:18,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:18,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:18,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:18,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:18,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:18,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:18,517 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:19,012 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:52:19,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:19,012 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:19,013 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:52:19,013 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:52:19,013 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 [2018-09-23 19:52:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:52:19,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-23 19:52:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:19,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:19,373 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:19,373 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:19,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:19,373 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:19,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:19,373 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:19,373 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:19,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-09-23 19:52:19,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:19,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:19,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:19,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:19,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:19,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:19,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:19,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:19,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:52:19,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:19,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:19,523 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:19,523 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:19,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:19,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:19,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:19,523 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:19,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:19,979 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:52:19,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:19,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:19,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:19,979 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:52:19,979 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:52:19,979 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 [2018-09-23 19:52:19,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:52:20,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-23 19:52:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:52:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:52:20,310 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:52:20,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:20,310 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:52:20,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:52:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:20,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:20,310 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:20,310 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:20,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:20,311 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-09-23 19:52:20,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:20,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:20,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:20,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:20,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:20,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:20,377 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 [2018-09-23 19:52:20,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:20,389 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:20,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:20,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:20,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:20,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:20,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:20,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:20,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:20,413 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:52:20,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:20,936 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:52:20,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:20,936 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:20,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:20,936 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:52:20,936 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:52:20,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:52:21,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-23 19:52:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:21,300 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:21,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:21,300 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:21,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:21,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:21,301 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:21,301 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:21,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:21,301 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-09-23 19:52:21,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:21,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:21,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:21,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:21,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:21,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:21,368 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 [2018-09-23 19:52:21,375 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:21,384 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:52:21,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:21,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:21,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:21,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:21,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:21,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:21,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:21,417 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:21,953 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:52:21,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:21,953 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:21,954 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:52:21,954 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:52:21,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:52:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-23 19:52:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:22,273 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:22,273 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:22,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:22,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:22,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:22,273 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:22,273 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:22,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:22,274 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-09-23 19:52:22,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:22,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:22,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:22,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:22,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:22,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:22,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:22,352 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:22,365 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:52:22,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:22,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:22,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:22,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:22,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:22,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:22,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:22,390 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:22,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:22,873 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:52:22,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:22,873 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:22,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:22,874 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:52:22,874 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:52:22,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:52:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-23 19:52:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:23,200 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:23,200 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:23,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:23,200 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:23,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:23,200 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:23,201 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:23,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:23,201 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-09-23 19:52:23,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:23,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:23,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:23,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:23,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:23,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:23,268 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 [2018-09-23 19:52:23,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:23,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:23,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:23,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:23,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:23,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:23,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:23,304 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:23,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:23,799 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:52:23,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:23,799 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:23,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:23,800 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:52:23,800 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:52:23,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:52:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-23 19:52:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:52:24,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:52:24,104 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-23 19:52:24,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:24,104 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:52:24,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:52:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:24,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:24,104 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:24,104 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:24,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:24,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-09-23 19:52:24,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:24,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:24,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:24,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:24,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:24,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:24,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:24,183 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:24,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:24,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:24,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:24,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:24,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:24,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:24,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:24,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:24,213 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-23 19:52:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:24,686 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:52:24,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:24,686 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:24,686 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:52:24,686 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:52:24,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:52:25,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-23 19:52:25,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:25,050 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:25,050 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:25,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:25,050 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:25,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:25,051 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:25,051 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:25,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:25,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-09-23 19:52:25,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:25,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:25,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:25,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:25,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:25,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:25,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:25,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:25,214 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:52:25,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:25,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:25,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:25,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:25,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:25,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:25,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:25,237 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:25,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:25,688 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:52:25,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:25,688 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:25,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:25,689 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:52:25,689 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:52:25,689 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 [2018-09-23 19:52:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:52:26,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-23 19:52:26,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:26,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:26,047 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:26,047 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:26,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:26,047 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:26,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:26,048 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:26,048 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:26,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:26,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-09-23 19:52:26,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:26,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:26,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:26,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:26,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:26,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:26,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:26,125 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:26,131 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:26,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:26,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:26,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:26,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:26,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:26,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:26,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:26,165 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:26,697 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:52:26,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:26,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:26,697 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:52:26,697 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:52:26,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:26,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:52:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-23 19:52:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:27,062 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:27,062 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:27,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:27,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:27,063 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:27,063 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:27,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:27,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-09-23 19:52:27,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:27,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:27,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:27,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:27,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:27,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:27,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:27,140 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:27,150 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:52:27,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:27,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:27,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:27,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:27,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:27,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:27,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:27,176 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:27,636 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:52:27,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:27,636 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:27,636 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:52:27,636 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:52:27,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:27,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:52:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-23 19:52:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:52:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:52:27,955 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:52:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:27,955 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:52:27,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:52:27,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:27,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:27,955 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:27,955 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:27,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:27,956 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-09-23 19:52:27,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:27,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:27,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:27,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:27,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:28,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:28,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:28,028 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:28,038 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:52:28,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:28,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:28,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:28,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:28,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:28,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:28,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:28,067 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:52:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:28,500 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:52:28,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:28,500 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:28,501 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:52:28,501 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:52:28,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:52:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-23 19:52:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:28,838 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:28,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:28,838 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:28,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:28,839 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:28,839 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:28,839 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:28,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:28,839 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-09-23 19:52:28,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:28,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:28,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:28,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:28,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:28,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:28,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:28,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:28,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:28,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:28,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:28,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:28,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:28,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:28,949 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:29,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:29,383 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:52:29,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:29,383 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:29,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:29,384 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:52:29,384 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:52:29,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:29,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:52:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-23 19:52:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:29,722 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:29,722 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:29,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:29,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:29,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:29,722 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:29,722 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:29,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:29,723 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-09-23 19:52:29,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:29,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:29,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:29,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:29,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:29,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:29,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:29,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:29,831 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:29,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:29,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:29,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:29,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:29,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:29,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:29,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:29,853 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:30,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:30,255 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:52:30,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:30,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:30,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:30,256 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:52:30,256 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:52:30,256 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 [2018-09-23 19:52:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:52:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-09-23 19:52:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:30,603 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:30,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:30,603 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:30,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:30,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:30,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:30,604 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:52:30,604 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:30,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:30,604 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-09-23 19:52:30,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:30,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:30,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:30,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:30,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:30,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:30,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:30,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:30,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:52:30,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:30,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:30,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:30,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:30,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:30,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:30,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:30,722 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:31,113 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-09-23 19:52:31,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:31,113 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:31,114 INFO L225 Difference]: With dead ends: 38 [2018-09-23 19:52:31,114 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 19:52:31,114 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 [2018-09-23 19:52:31,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 19:52:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-09-23 19:52:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 19:52:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-23 19:52:31,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-09-23 19:52:31,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:31,341 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-23 19:52:31,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-23 19:52:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:31,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:31,342 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-23 19:52:31,342 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:31,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:31,342 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-09-23 19:52:31,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:31,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:31,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:31,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:31,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:31,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:31,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:31,429 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:31,471 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:31,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:31,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:31,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:31,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:31,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:31,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:31,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:31,505 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-09-23 19:52:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:32,310 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:52:32,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:32,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:32,311 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:52:32,311 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:52:32,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:32,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:52:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-23 19:52:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:32,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:32,695 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:32,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:32,696 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:32,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:32,696 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:32,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:32,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:32,696 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:52:32,696 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:32,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:32,696 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-09-23 19:52:32,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:32,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:32,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:32,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:32,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:32,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:32,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:32,779 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:32,789 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:52:32,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:32,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:32,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:32,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:32,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:32,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:32,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:32,813 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:33,587 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:52:33,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:33,587 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:33,588 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:52:33,588 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:52:33,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:52:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-23 19:52:33,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:33,958 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:33,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:33,958 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:33,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:33,958 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:33,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:33,958 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:52:33,958 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:33,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:33,959 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-09-23 19:52:33,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:33,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:33,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:33,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:33,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:34,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:34,025 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 [2018-09-23 19:52:34,036 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:34,045 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:52:34,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:34,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:34,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:34,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:34,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:34,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:34,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:34,069 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:34,819 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:52:34,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:34,819 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:34,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:34,819 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:52:34,819 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:52:34,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:34,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:52:35,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-23 19:52:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:35,232 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:35,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:35,232 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:35,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:35,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:35,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:35,233 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:35,233 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:35,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-09-23 19:52:35,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:35,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:35,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:35,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:35,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:35,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:35,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:35,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:35,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:35,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:35,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:35,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:35,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:35,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:35,348 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:36,057 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:52:36,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:36,057 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:36,058 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:52:36,058 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:52:36,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:36,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:52:36,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-23 19:52:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:52:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:52:36,439 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:52:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:36,439 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:52:36,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:36,439 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:52:36,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:36,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:36,440 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:52:36,440 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:36,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:36,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-09-23 19:52:36,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:36,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:36,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:36,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:36,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:36,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:36,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:36,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:36,520 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:36,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:36,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:36,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:36,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:36,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:36,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:36,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:36,542 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:52:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:37,320 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:52:37,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:37,320 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:37,321 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:52:37,321 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:52:37,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:52:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-23 19:52:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:37,768 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:37,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:37,768 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:37,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:37,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:37,768 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:37,768 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:37,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:37,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-09-23 19:52:37,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:37,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:37,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:37,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:37,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:37,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:37,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:37,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:37,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:52:37,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:37,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:37,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:37,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:37,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:37,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:37,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:37,890 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:38,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:38,663 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:52:38,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:38,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:38,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:38,664 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:52:38,664 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:52:38,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:38,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:52:39,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-23 19:52:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:39,032 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:39,032 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:39,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:39,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:39,032 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:39,032 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:39,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:39,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-09-23 19:52:39,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:39,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:39,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:39,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:39,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:39,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:39,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:39,106 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:39,112 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:39,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:39,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:39,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:39,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:39,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:39,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:39,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:39,135 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:39,875 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:52:39,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:39,875 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:39,876 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:52:39,876 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:52:39,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:52:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-23 19:52:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:40,284 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:40,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:40,285 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:40,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:40,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:40,285 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:40,285 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:40,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:40,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-09-23 19:52:40,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:40,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:40,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:40,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:40,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:40,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:40,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:40,361 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:40,371 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:52:40,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:40,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:40,403 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:40,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:40,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:40,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:40,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:40,404 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:41,255 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:52:41,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:41,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:41,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:41,256 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:52:41,256 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:52:41,256 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 [2018-09-23 19:52:41,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:52:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-23 19:52:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:52:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:52:41,569 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-23 19:52:41,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:41,569 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:52:41,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:41,570 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:52:41,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:41,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:41,570 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:52:41,570 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:41,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:41,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-09-23 19:52:41,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:41,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:41,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:41,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:41,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:41,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:41,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:41,648 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:41,657 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:52:41,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:41,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:41,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:41,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:41,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:41,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:41,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:41,681 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-23 19:52:42,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:42,443 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:52:42,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:42,443 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:42,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:42,444 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:52:42,444 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:52:42,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:52:42,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-23 19:52:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:42,824 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:42,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:42,824 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:42,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:42,825 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:42,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:42,825 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:42,825 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:42,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:42,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-09-23 19:52:42,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:42,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:42,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:42,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:42,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:42,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:42,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:42,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:42,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:42,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:42,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:42,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:42,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:42,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:42,938 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:43,630 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:52:43,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:43,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:43,630 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:52:43,630 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:52:43,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:43,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:52:43,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-23 19:52:43,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:43,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:43,995 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:43,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:43,995 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:43,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:43,995 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:43,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:43,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:43,995 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:43,995 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:43,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:43,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-09-23 19:52:43,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:43,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:43,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:43,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:43,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:44,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:44,065 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 [2018-09-23 19:52:44,073 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:44,079 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:44,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:44,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:44,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:44,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:44,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:44,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:44,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:44,105 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:44,827 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:52:44,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:44,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:44,828 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:52:44,828 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:52:44,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:52:45,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-23 19:52:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:45,223 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:45,224 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:45,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:45,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:45,224 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:45,224 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:45,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:45,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-09-23 19:52:45,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:45,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:45,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:45,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:45,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:45,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:45,345 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 [2018-09-23 19:52:45,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:45,368 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:52:45,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:45,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:45,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:45,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:45,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:45,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:45,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:45,391 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:46,089 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:52:46,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:46,089 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:46,090 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:52:46,090 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:52:46,090 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 [2018-09-23 19:52:46,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:52:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-23 19:52:46,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:52:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:52:46,460 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:52:46,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:46,461 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:52:46,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:46,461 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:52:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:46,461 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:46,461 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:46,461 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:46,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:46,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-09-23 19:52:46,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:46,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:46,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:46,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:46,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:46,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:46,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:46,555 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:46,561 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:46,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:46,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:46,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:46,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:46,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:46,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:46,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:46,587 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:52:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:47,227 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:52:47,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:47,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:47,228 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:52:47,228 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:52:47,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:52:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-23 19:52:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:47,617 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:47,617 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:47,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:47,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:47,618 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:47,618 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:47,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:47,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-09-23 19:52:47,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:47,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:47,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:47,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:47,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:47,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:47,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:47,702 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:47,712 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:52:47,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:47,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:47,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:47,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:47,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:47,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:47,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:47,736 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:48,371 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:52:48,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:48,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:48,372 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:52:48,372 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:52:48,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:52:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-23 19:52:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:48,762 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:48,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:48,763 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:48,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:48,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:48,763 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:48,763 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:48,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-09-23 19:52:48,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:48,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:48,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:48,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:48,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:48,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:48,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:48,845 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:48,858 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:52:48,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:48,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:48,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:48,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:48,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:48,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:48,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:48,884 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:49,535 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:52:49,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:49,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:49,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:49,536 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:52:49,536 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:52:49,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:52:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-23 19:52:49,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:49,951 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:49,951 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:49,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:49,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:49,952 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:49,952 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:49,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:49,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-09-23 19:52:49,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:49,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:49,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:49,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:49,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:50,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:50,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:50,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:50,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:50,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:50,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:50,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:50,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:50,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:50,066 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:50,672 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:52:50,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:50,672 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:50,673 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:52:50,673 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:52:50,673 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 [2018-09-23 19:52:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:52:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-23 19:52:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:52:50,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:52:50,985 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-23 19:52:50,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:50,985 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:52:50,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:50,985 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:52:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:50,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:50,985 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:52:50,985 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:50,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:50,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-09-23 19:52:50,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:50,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:50,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:50,986 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:50,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:51,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:51,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:51,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:51,079 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:51,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:51,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:51,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:51,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:51,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:51,101 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-23 19:52:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:51,918 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:52:51,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:51,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:51,919 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:52:51,919 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:52:51,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:51,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:52:52,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-23 19:52:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:52,312 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:52,313 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:52,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:52,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:52,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:52,313 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:52,313 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:52,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:52,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-09-23 19:52:52,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:52,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:52,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:52,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:52,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:52,381 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:52,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:52,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:52:52,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:52:52,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:52,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:52,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:52,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:52,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:52,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:52,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:52,422 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:53,238 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:52:53,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:53,238 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:53,239 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:52:53,239 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:52:53,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:52:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-23 19:52:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:53,614 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:53,615 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:53,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:53,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:53,615 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:53,615 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:53,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:53,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-09-23 19:52:53,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:53,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:53,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:53,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:53,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:53,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:53,683 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 [2018-09-23 19:52:53,692 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:52:53,698 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:52:53,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:53,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:53,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:53,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:53,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:53,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:53,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:53,722 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:54,500 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:52:54,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:54,500 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:54,501 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:52:54,501 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:52:54,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:52:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-23 19:52:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:54,897 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:54,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:54,897 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:54,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:54,898 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:54,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:54,898 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:54,898 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:54,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:54,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-09-23 19:52:54,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:54,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:54,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:54,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:54,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:54,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:54,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:52:54,990 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:52:55,001 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:52:55,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:55,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:55,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:55,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:55,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:55,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:55,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:55,025 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:55,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:55,772 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:52:55,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:55,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:55,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:55,773 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:52:55,773 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:52:55,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:55,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:52:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-23 19:52:56,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:52:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:52:56,168 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:52:56,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:56,168 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:52:56,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:52:56,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:56,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:56,169 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:52:56,169 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:56,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:56,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-09-23 19:52:56,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:56,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:56,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:56,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:56,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:56,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:56,242 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 [2018-09-23 19:52:56,257 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:52:56,365 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:52:56,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:56,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:56,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:56,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:56,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:56,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:56,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:56,396 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:52:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:57,230 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:52:57,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:57,230 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:57,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:57,231 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:52:57,231 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:52:57,231 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 [2018-09-23 19:52:57,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:52:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-23 19:52:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:52:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:52:57,634 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:52:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:57,634 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:52:57,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:52:57,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:57,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:57,635 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:57,635 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:57,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:57,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-09-23 19:52:57,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:57,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:57,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:52:57,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:57,722 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:57,722 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 [2018-09-23 19:52:57,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:57,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:57,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:57,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:57,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:57,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:57,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:57,759 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:52:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:58,593 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-23 19:52:58,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:58,593 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:58,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:58,593 INFO L225 Difference]: With dead ends: 61 [2018-09-23 19:52:58,593 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:52:58,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:58,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:52:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-23 19:52:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:52:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:52:58,997 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:52:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:52:58,997 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:52:58,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:52:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:52:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:52:58,997 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:52:58,997 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:52:58,997 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:52:58,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:52:58,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-09-23 19:52:58,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:52:58,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:52:58,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:58,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:52:58,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:52:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:52:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:59,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:52:59,070 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 [2018-09-23 19:52:59,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:52:59,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:52:59,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:52:59,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:52:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:52:59,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:52:59,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:52:59,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:52:59,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:52:59,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:59,110 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:52:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:52:59,879 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-23 19:52:59,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:52:59,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:52:59,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:52:59,880 INFO L225 Difference]: With dead ends: 59 [2018-09-23 19:52:59,880 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 19:52:59,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:52:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 19:53:00,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-23 19:53:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:00,285 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:00,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:00,285 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:00,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:00,285 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:00,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:00,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:00,285 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:00,286 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:00,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:00,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-09-23 19:53:00,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:00,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:00,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:00,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:00,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:00,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:00,362 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 [2018-09-23 19:53:00,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:00,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:53:00,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:00,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:00,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:00,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:00,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:00,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:00,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:00,410 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:01,138 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:53:01,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:01,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:01,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:01,139 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:53:01,139 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:53:01,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:01,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:53:01,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-23 19:53:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:53:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:53:01,509 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-23 19:53:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:01,509 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:53:01,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:53:01,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:01,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:01,510 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:01,510 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:01,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:01,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-09-23 19:53:01,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:01,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:01,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:01,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:01,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:01,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:01,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:01,589 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:01,595 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:01,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:01,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:01,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:01,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:01,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:01,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:01,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:01,621 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-23 19:53:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:02,370 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:53:02,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:02,370 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:02,371 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:53:02,371 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:53:02,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:53:02,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-23 19:53:02,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:02,764 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:02,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:02,764 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:02,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:02,764 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:02,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:02,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:02,764 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:02,764 INFO L423 AbstractCegarLoop]: === Iteration 345 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:02,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:02,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1711263936, now seen corresponding path program 329 times [2018-09-23 19:53:02,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:02,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:02,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:02,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:02,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:02,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:02,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:02,907 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:02,916 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:53:02,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:02,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:02,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:02,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:02,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:02,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:02,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:02,941 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:03,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:03,653 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:53:03,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:03,653 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:03,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:03,654 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:53:03,654 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:53:03,654 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 [2018-09-23 19:53:03,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:53:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-23 19:53:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:53:04,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:53:04,051 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:53:04,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:04,051 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:53:04,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:04,051 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:53:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:04,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:04,051 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:04,052 INFO L423 AbstractCegarLoop]: === Iteration 346 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:04,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:04,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1713109056, now seen corresponding path program 330 times [2018-09-23 19:53:04,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:04,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:04,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:04,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:04,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:04,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:04,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:04,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:04,172 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:04,182 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:53:04,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:04,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:04,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:04,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:04,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:04,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:04,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:04,206 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:53:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:04,961 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-23 19:53:04,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:04,961 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:04,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:04,962 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:53:04,962 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:53:04,962 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 [2018-09-23 19:53:04,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:53:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-23 19:53:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:05,373 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:05,373 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:05,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:05,373 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:05,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:05,373 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:05,373 INFO L423 AbstractCegarLoop]: === Iteration 347 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:05,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1713110978, now seen corresponding path program 331 times [2018-09-23 19:53:05,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:05,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:05,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:05,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:05,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:05,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:05,444 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 [2018-09-23 19:53:05,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:05,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:05,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:05,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:05,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:05,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:05,482 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:06,179 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:53:06,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:06,179 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:06,180 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:53:06,180 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:53:06,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:53:06,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-23 19:53:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:53:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:53:06,549 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:53:06,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:06,549 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:53:06,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:53:06,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:06,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:06,550 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:06,550 INFO L423 AbstractCegarLoop]: === Iteration 348 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:06,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:06,550 INFO L82 PathProgramCache]: Analyzing trace with hash -808697920, now seen corresponding path program 332 times [2018-09-23 19:53:06,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:06,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:06,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:06,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:06,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:06,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:06,617 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 [2018-09-23 19:53:06,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:06,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:06,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:06,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:06,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:06,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:06,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:06,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:06,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:06,655 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:53:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:07,341 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:53:07,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:07,341 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:07,342 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:53:07,342 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:53:07,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:53:07,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-23 19:53:07,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:07,772 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:07,772 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:07,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:07,773 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:07,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:07,773 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:07,773 INFO L423 AbstractCegarLoop]: === Iteration 349 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:07,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:07,773 INFO L82 PathProgramCache]: Analyzing trace with hash -808695998, now seen corresponding path program 333 times [2018-09-23 19:53:07,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:07,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:07,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:07,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:07,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:07,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:07,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:07,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:07,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:53:07,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:07,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:07,880 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:07,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:07,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:07,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:07,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:07,881 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:08,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:08,582 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:53:08,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:08,582 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:08,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:08,583 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:53:08,583 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:53:08,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:53:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-23 19:53:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:53:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:53:08,990 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:53:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:08,990 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:53:08,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:53:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:08,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:08,991 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:08,991 INFO L423 AbstractCegarLoop]: === Iteration 350 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:08,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:08,991 INFO L82 PathProgramCache]: Analyzing trace with hash -806850878, now seen corresponding path program 334 times [2018-09-23 19:53:08,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:08,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:08,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:08,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:08,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:09,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:09,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:09,068 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:09,074 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:09,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:09,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:09,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:09,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:09,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:09,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:09,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:09,097 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:53:09,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:09,766 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:53:09,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:09,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:09,767 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:53:09,767 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:53:09,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:53:10,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-23 19:53:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:10,189 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:10,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:10,189 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:10,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:10,189 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:10,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:10,189 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:53:10,190 INFO L423 AbstractCegarLoop]: === Iteration 351 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:10,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:10,190 INFO L82 PathProgramCache]: Analyzing trace with hash -806848956, now seen corresponding path program 335 times [2018-09-23 19:53:10,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:10,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:10,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:10,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:10,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:10,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:10,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:10,362 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:10,372 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:53:10,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:10,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:10,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:10,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:10,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:10,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:10,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:10,396 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:10,998 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:53:10,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:10,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:10,999 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:53:10,999 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:53:10,999 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 [2018-09-23 19:53:10,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:53:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-23 19:53:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 19:53:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-23 19:53:11,289 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-23 19:53:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:11,289 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-23 19:53:11,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-23 19:53:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:11,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:11,289 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:53:11,289 INFO L423 AbstractCegarLoop]: === Iteration 352 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:11,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:11,290 INFO L82 PathProgramCache]: Analyzing trace with hash -256666948, now seen corresponding path program 336 times [2018-09-23 19:53:11,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:11,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:11,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:11,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:11,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:11,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:11,360 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 [2018-09-23 19:53:11,367 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:11,376 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:53:11,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:11,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:11,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:11,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:11,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:11,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:11,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:11,399 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-23 19:53:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:12,208 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:53:12,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:12,208 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:12,209 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:53:12,209 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:53:12,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:12,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:53:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-23 19:53:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:12,635 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:12,635 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:12,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:12,635 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:12,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:12,635 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:12,636 INFO L423 AbstractCegarLoop]: === Iteration 353 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:12,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:12,636 INFO L82 PathProgramCache]: Analyzing trace with hash -256665026, now seen corresponding path program 337 times [2018-09-23 19:53:12,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:12,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:12,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:12,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:12,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:12,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:12,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:12,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:12,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:12,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:12,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:12,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:12,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:12,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:12,746 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:13,478 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:53:13,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:13,478 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:13,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:13,478 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:53:13,478 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:53:13,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:53:13,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-23 19:53:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:53:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:53:13,873 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:53:13,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:13,873 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:53:13,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:13,873 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:53:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:13,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:13,873 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:13,873 INFO L423 AbstractCegarLoop]: === Iteration 354 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:13,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:13,873 INFO L82 PathProgramCache]: Analyzing trace with hash -254819906, now seen corresponding path program 338 times [2018-09-23 19:53:13,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:13,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:13,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:13,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:13,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:13,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:13,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:13,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:13,991 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:13,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:13,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:14,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:14,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:14,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:14,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:14,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:14,014 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:53:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:14,751 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:53:14,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:14,751 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:14,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:14,752 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:53:14,752 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:53:14,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:53:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-23 19:53:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:15,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:15,164 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:15,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:15,165 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:15,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:15,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:15,165 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:15,165 INFO L423 AbstractCegarLoop]: === Iteration 355 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:15,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash -254817984, now seen corresponding path program 339 times [2018-09-23 19:53:15,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:15,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:15,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:15,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:15,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:15,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:15,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:15,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:15,246 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:15,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:53:15,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:15,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:15,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:15,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:15,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:15,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:15,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:15,280 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:15,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:15,992 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:53:15,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:15,992 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:15,992 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:53:15,992 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:53:15,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:53:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-23 19:53:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:53:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:53:16,411 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:53:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:16,411 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:53:16,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:53:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:16,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:16,411 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:16,411 INFO L423 AbstractCegarLoop]: === Iteration 356 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:16,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:16,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1518340414, now seen corresponding path program 340 times [2018-09-23 19:53:16,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:16,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:16,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:16,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:16,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:16,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:16,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:16,503 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:16,530 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:16,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:16,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:16,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:16,562 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:16,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:16,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:16,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:16,562 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:53:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:17,265 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:53:17,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:17,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:17,266 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:53:17,266 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:53:17,266 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 [2018-09-23 19:53:17,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:53:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-23 19:53:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:17,725 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:17,725 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:17,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:17,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:17,725 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:17,726 INFO L423 AbstractCegarLoop]: === Iteration 357 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:17,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:17,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1518342336, now seen corresponding path program 341 times [2018-09-23 19:53:17,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:17,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:17,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:17,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:17,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:17,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:17,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:17,802 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:17,812 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:53:17,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:17,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:17,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:17,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:17,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:17,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:17,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:17,836 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:18,529 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:53:18,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:18,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:18,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:18,530 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:53:18,530 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:53:18,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:18,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:53:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-23 19:53:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:53:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:53:18,929 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:53:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:18,930 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:53:18,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:53:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:18,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:18,930 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:18,930 INFO L423 AbstractCegarLoop]: === Iteration 358 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:18,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1520187456, now seen corresponding path program 342 times [2018-09-23 19:53:18,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:18,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:18,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:18,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:18,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:19,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:19,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:19,008 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:19,017 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:53:19,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:19,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:19,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:19,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:19,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:19,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:19,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:19,043 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:53:19,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:19,700 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:53:19,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:19,700 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:19,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:19,701 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:53:19,701 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:53:19,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:19,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:53:20,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-23 19:53:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:20,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:20,121 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:20,121 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:20,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:20,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:20,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:20,121 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:20,121 INFO L423 AbstractCegarLoop]: === Iteration 359 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:20,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:20,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1520189378, now seen corresponding path program 343 times [2018-09-23 19:53:20,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:20,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:20,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:20,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:20,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:20,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:20,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:20,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:20,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:20,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:20,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:20,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:20,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:20,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:20,228 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:20,854 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:53:20,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:20,854 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:20,854 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:53:20,854 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:53:20,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:20,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:53:21,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-23 19:53:21,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:53:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:53:21,228 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-23 19:53:21,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:21,228 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:53:21,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:21,229 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:53:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:21,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:21,229 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:21,229 INFO L423 AbstractCegarLoop]: === Iteration 360 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:21,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:21,229 INFO L82 PathProgramCache]: Analyzing trace with hash 423391422, now seen corresponding path program 344 times [2018-09-23 19:53:21,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:21,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:21,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:21,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:21,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:21,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:21,348 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:21,354 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:21,359 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:21,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:21,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:21,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:21,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:21,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:21,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:21,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:21,382 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-23 19:53:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:22,137 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:53:22,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:22,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:22,137 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:53:22,137 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:53:22,137 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 [2018-09-23 19:53:22,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:53:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-23 19:53:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:22,579 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:22,579 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:22,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:22,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:22,579 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:22,580 INFO L423 AbstractCegarLoop]: === Iteration 361 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:22,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:22,580 INFO L82 PathProgramCache]: Analyzing trace with hash 423393344, now seen corresponding path program 345 times [2018-09-23 19:53:22,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:22,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:22,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:22,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:22,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:22,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:22,644 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 [2018-09-23 19:53:22,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:22,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:53:22,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:22,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:22,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:22,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:22,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:22,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:22,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:22,694 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:23,412 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:53:23,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:23,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:23,413 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:53:23,413 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:53:23,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:53:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-23 19:53:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:53:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:53:23,836 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:53:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:23,837 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:53:23,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:53:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:23,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:23,837 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:23,837 INFO L423 AbstractCegarLoop]: === Iteration 362 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:23,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash 425238464, now seen corresponding path program 346 times [2018-09-23 19:53:23,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:23,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:23,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:23,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:23,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:23,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:23,998 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 [2018-09-23 19:53:24,005 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:24,011 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:24,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:24,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:24,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:24,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:24,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:24,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:24,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:24,044 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:53:24,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:24,827 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-23 19:53:24,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:24,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:24,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:24,827 INFO L225 Difference]: With dead ends: 55 [2018-09-23 19:53:24,827 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 19:53:24,827 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 [2018-09-23 19:53:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 19:53:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-23 19:53:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:25,254 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:25,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:25,254 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:25,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:25,254 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:25,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:25,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:25,255 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:25,255 INFO L423 AbstractCegarLoop]: === Iteration 363 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:25,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:25,255 INFO L82 PathProgramCache]: Analyzing trace with hash 425240386, now seen corresponding path program 347 times [2018-09-23 19:53:25,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:25,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:25,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:25,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:25,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:25,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:25,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:25,332 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:25,343 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:53:25,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:25,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:25,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:25,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:25,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:25,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:25,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:25,367 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:26,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:26,100 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-23 19:53:26,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:26,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:26,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:26,100 INFO L225 Difference]: With dead ends: 53 [2018-09-23 19:53:26,100 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:53:26,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:26,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:53:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-23 19:53:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:53:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:53:26,504 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:53:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:26,504 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:53:26,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:53:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:26,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:26,504 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:26,504 INFO L423 AbstractCegarLoop]: === Iteration 364 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:26,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:26,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2096568512, now seen corresponding path program 348 times [2018-09-23 19:53:26,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:26,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:26,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:26,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:26,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:26,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:26,575 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 [2018-09-23 19:53:26,582 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:26,594 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:53:26,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:26,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:26,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:26,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:26,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:26,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:26,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:26,617 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:53:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:27,313 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:53:27,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:27,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:27,313 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:53:27,313 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:53:27,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:53:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-23 19:53:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:27,750 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:27,750 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:27,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:27,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:27,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:27,750 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:27,750 INFO L423 AbstractCegarLoop]: === Iteration 365 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:27,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:27,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2096566590, now seen corresponding path program 349 times [2018-09-23 19:53:27,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:27,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:27,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:27,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:27,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:27,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:27,817 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 [2018-09-23 19:53:27,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:27,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:27,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:27,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:27,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:27,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:27,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:27,855 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:28,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:28,556 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-23 19:53:28,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:28,556 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:28,557 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:53:28,557 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 19:53:28,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 19:53:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-23 19:53:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:53:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:53:28,962 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:53:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:28,963 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:53:28,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:53:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:28,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:28,963 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:28,963 INFO L423 AbstractCegarLoop]: === Iteration 366 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:28,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:28,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2094721470, now seen corresponding path program 350 times [2018-09-23 19:53:28,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:28,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:28,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:28,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:28,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:29,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:29,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:29,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:29,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:29,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:29,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:29,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:29,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:29,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:29,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:29,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:29,099 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:53:29,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:29,759 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:53:29,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:29,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:29,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:29,760 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:53:29,760 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:53:29,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:53:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-23 19:53:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:30,176 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:30,176 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:30,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:30,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:30,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:30,176 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:53:30,176 INFO L423 AbstractCegarLoop]: === Iteration 367 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:30,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:30,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2094719548, now seen corresponding path program 351 times [2018-09-23 19:53:30,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:30,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:30,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:30,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:30,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:30,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:30,244 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 [2018-09-23 19:53:30,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:30,262 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:53:30,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:30,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:30,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:30,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:30,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:30,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:30,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:30,286 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:30,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:30,918 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:53:30,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:30,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:30,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:30,919 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:53:30,919 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:53:30,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:53:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-23 19:53:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 19:53:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-23 19:53:31,269 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-23 19:53:31,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:31,270 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-23 19:53:31,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-23 19:53:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:31,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:31,270 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:31,270 INFO L423 AbstractCegarLoop]: === Iteration 368 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:31,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:31,270 INFO L82 PathProgramCache]: Analyzing trace with hash 444397630, now seen corresponding path program 352 times [2018-09-23 19:53:31,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:31,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:31,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:31,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:31,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:31,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:31,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:31,390 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:31,399 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:31,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:31,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:31,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:31,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:31,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:31,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:31,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:31,422 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-23 19:53:32,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:32,089 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:53:32,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:32,089 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:32,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:32,089 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:53:32,089 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:53:32,090 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 [2018-09-23 19:53:32,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:53:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-23 19:53:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:32,567 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:32,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:32,567 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:32,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:32,567 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:32,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:32,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:32,567 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:32,567 INFO L423 AbstractCegarLoop]: === Iteration 369 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:32,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:32,568 INFO L82 PathProgramCache]: Analyzing trace with hash 444399552, now seen corresponding path program 353 times [2018-09-23 19:53:32,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:32,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:32,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:32,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:32,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:32,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:32,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:32,645 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:32,655 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:53:32,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:32,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:32,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:32,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:32,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:32,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:32,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:32,686 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:33,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:33,376 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:53:33,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:33,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:33,377 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:53:33,377 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:53:33,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:33,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:53:33,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-23 19:53:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:53:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:53:33,835 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:53:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:33,836 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:53:33,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:33,836 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:53:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:33,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:33,836 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:33,836 INFO L423 AbstractCegarLoop]: === Iteration 370 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:33,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:33,836 INFO L82 PathProgramCache]: Analyzing trace with hash 446244672, now seen corresponding path program 354 times [2018-09-23 19:53:33,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:33,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:33,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:33,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:33,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:33,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:33,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:33,910 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:33,919 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:53:33,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:33,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:33,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:33,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:33,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:33,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:33,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:33,943 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:53:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:34,569 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:53:34,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:34,569 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:34,570 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:53:34,570 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:53:34,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:34,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:53:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-23 19:53:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:35,027 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:35,027 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:35,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:35,027 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:35,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:35,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:35,027 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:35,027 INFO L423 AbstractCegarLoop]: === Iteration 371 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:35,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:35,028 INFO L82 PathProgramCache]: Analyzing trace with hash 446246594, now seen corresponding path program 355 times [2018-09-23 19:53:35,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:35,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:35,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:35,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:35,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:35,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:35,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:35,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:35,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:35,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:35,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:35,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:35,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:35,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:35,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:35,135 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:35,741 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:53:35,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:35,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:35,742 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:53:35,742 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:53:35,742 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 [2018-09-23 19:53:35,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:53:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-23 19:53:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:53:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:53:36,148 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:53:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:36,148 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:53:36,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:53:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:36,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:36,149 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:36,149 INFO L423 AbstractCegarLoop]: === Iteration 372 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:36,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:36,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2075562304, now seen corresponding path program 356 times [2018-09-23 19:53:36,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:36,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:36,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:36,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:36,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:36,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:36,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:36,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:36,244 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:36,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:36,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:36,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:36,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:36,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:36,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:36,269 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:53:36,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:36,938 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:53:36,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:36,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:36,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:36,939 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:53:36,939 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:53:36,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:36,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:53:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-23 19:53:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:37,376 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:37,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:37,376 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:37,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:37,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:37,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:37,376 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:37,377 INFO L423 AbstractCegarLoop]: === Iteration 373 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:37,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:37,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2075560382, now seen corresponding path program 357 times [2018-09-23 19:53:37,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:37,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:37,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:37,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:37,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:37,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:37,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:37,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:37,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:53:37,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:37,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:37,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:37,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:37,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:37,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:37,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:37,489 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:38,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:38,161 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-23 19:53:38,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:38,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:38,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:38,162 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:53:38,162 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:53:38,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:38,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:53:38,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-23 19:53:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:53:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:53:38,609 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:53:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:38,609 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:53:38,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:53:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:38,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:38,610 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:38,610 INFO L423 AbstractCegarLoop]: === Iteration 374 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:38,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:38,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2073715262, now seen corresponding path program 358 times [2018-09-23 19:53:38,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:38,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:38,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:38,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:38,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:38,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:38,680 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 [2018-09-23 19:53:38,687 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:38,693 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:38,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:38,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:38,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:38,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:38,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:38,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:38,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:38,716 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:53:39,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:39,348 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-23 19:53:39,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:39,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:39,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:39,349 INFO L225 Difference]: With dead ends: 47 [2018-09-23 19:53:39,349 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 19:53:39,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:39,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 19:53:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-23 19:53:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:39,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:39,787 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:39,787 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:39,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:39,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:39,788 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:53:39,788 INFO L423 AbstractCegarLoop]: === Iteration 375 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:39,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:39,788 INFO L82 PathProgramCache]: Analyzing trace with hash -2073713340, now seen corresponding path program 359 times [2018-09-23 19:53:39,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:39,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:39,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:39,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:39,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:39,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:39,873 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 [2018-09-23 19:53:39,880 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:39,890 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:53:39,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:39,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:39,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:39,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:39,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:39,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:39,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:39,914 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:40,487 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:53:40,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:40,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:40,488 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:53:40,488 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:53:40,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:53:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-23 19:53:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 19:53:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-23 19:53:40,862 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-23 19:53:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:40,863 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-23 19:53:40,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-23 19:53:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:40,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:40,863 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-23 19:53:40,863 INFO L423 AbstractCegarLoop]: === Iteration 376 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:40,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:40,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1124456000, now seen corresponding path program 360 times [2018-09-23 19:53:40,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:40,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:40,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:40,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:40,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:40,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:40,927 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 [2018-09-23 19:53:40,935 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:40,946 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:53:40,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:40,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:40,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:40,973 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:40,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:40,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:40,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:40,973 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-23 19:53:41,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:41,547 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:53:41,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:41,547 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:41,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:41,547 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:53:41,547 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:53:41,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:41,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:53:41,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-23 19:53:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:41,998 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:41,999 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:41,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:41,999 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:41,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:41,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:41,999 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:41,999 INFO L423 AbstractCegarLoop]: === Iteration 377 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:41,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:41,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1124457922, now seen corresponding path program 361 times [2018-09-23 19:53:41,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:41,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:42,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:42,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:42,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:42,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:42,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:42,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:42,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:42,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:42,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:42,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:42,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:42,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:42,103 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:42,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:42,687 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:53:42,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:42,687 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:42,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:42,688 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:53:42,688 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:53:42,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:53:43,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-23 19:53:43,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:53:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:53:43,138 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:53:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:43,138 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:53:43,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:53:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:43,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:43,139 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:43,139 INFO L423 AbstractCegarLoop]: === Iteration 378 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:43,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:43,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1126303042, now seen corresponding path program 362 times [2018-09-23 19:53:43,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:43,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:43,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:43,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:43,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:43,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:43,215 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 [2018-09-23 19:53:43,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:53:43,227 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:53:43,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:43,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:43,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:43,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:43,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:43,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:43,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:43,253 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:53:43,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:43,949 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-23 19:53:43,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:43,949 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:43,949 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:53:43,949 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:53:43,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:53:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-23 19:53:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:44,443 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:44,443 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:44,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:44,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:44,444 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:53:44,444 INFO L423 AbstractCegarLoop]: === Iteration 379 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:44,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:44,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1126304964, now seen corresponding path program 363 times [2018-09-23 19:53:44,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:44,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:44,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:44,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:44,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:44,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:44,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:44,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:53:44,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 19:53:44,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:44,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:44,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:44,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:44,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:44,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:44,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:44,559 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:45,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:45,126 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-23 19:53:45,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:45,126 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:45,127 INFO L225 Difference]: With dead ends: 43 [2018-09-23 19:53:45,127 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 19:53:45,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 19:53:45,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-23 19:53:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:53:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-23 19:53:45,561 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-23 19:53:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:45,561 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-23 19:53:45,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-23 19:53:45,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:45,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:45,561 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-23 19:53:45,561 INFO L423 AbstractCegarLoop]: === Iteration 380 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:45,562 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:45,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1395503934, now seen corresponding path program 364 times [2018-09-23 19:53:45,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:45,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:45,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:45,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:45,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:45,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:45,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:45,642 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:53:45,648 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:53:45,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:45,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:45,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:45,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:45,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:45,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:45,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:45,671 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-23 19:53:46,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:46,211 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:53:46,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:46,211 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:46,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:46,212 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:53:46,212 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:53:46,212 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 [2018-09-23 19:53:46,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:53:46,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-23 19:53:46,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:46,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:46,677 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:46,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:46,677 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:46,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:46,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:46,677 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:53:46,678 INFO L423 AbstractCegarLoop]: === Iteration 381 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:46,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:46,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1395502012, now seen corresponding path program 365 times [2018-09-23 19:53:46,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:46,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:46,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:46,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:46,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:46,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:46,848 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 [2018-09-23 19:53:46,855 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:53:46,865 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-23 19:53:46,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:46,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:46,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:46,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:46,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:46,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:46,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:46,888 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-23 19:53:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:47,456 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-23 19:53:47,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:47,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:47,457 INFO L225 Difference]: With dead ends: 41 [2018-09-23 19:53:47,457 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:53:47,457 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 [2018-09-23 19:53:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:53:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-23 19:53:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 19:53:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-23 19:53:47,897 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-23 19:53:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:47,897 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-23 19:53:47,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:47,897 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-23 19:53:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:47,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:47,897 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-23 19:53:47,898 INFO L423 AbstractCegarLoop]: === Iteration 382 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:47,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:47,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1393656892, now seen corresponding path program 366 times [2018-09-23 19:53:47,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:47,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:47,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:47,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:47,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:47,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:47,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:53:47,977 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:53:47,987 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-23 19:53:47,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:53:47,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:48,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:48,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:48,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:48,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:48,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:48,011 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-23 19:53:48,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:53:48,544 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-23 19:53:48,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:53:48,544 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-23 19:53:48,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:53:48,545 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:53:48,545 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 19:53:48,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 19:53:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-09-23 19:53:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 19:53:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-23 19:53:48,995 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-23 19:53:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:53:48,995 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-23 19:53:48,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:53:48,995 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-23 19:53:48,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 19:53:48,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:53:48,995 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-23 19:53:48,996 INFO L423 AbstractCegarLoop]: === Iteration 383 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:53:48,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:53:48,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1393654970, now seen corresponding path program 367 times [2018-09-23 19:53:48,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:53:48,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:53:48,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:48,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:53:48,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:53:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:49,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:53:49,069 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 [2018-09-23 19:53:49,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:53:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:53:49,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:53:49,088 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:53:49,108 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:53:49,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:53:49,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:53:49,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:53:49,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:53:49,108 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. Received shutdown request... [2018-09-23 19:53:49,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:53:49,499 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:53:49,505 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:53:49,506 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:53:49 BoogieIcfgContainer [2018-09-23 19:53:49,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:53:49,507 INFO L168 Benchmark]: Toolchain (without parser) took 258559.03 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -444.1 MB). Free memory was 1.5 GB in the beginning and 999.7 MB in the end (delta: 457.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2018-09-23 19:53:49,508 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:53:49,508 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:53:49,509 INFO L168 Benchmark]: Boogie Preprocessor took 26.04 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:53:49,509 INFO L168 Benchmark]: RCFGBuilder took 228.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:53:49,509 INFO L168 Benchmark]: TraceAbstraction took 258254.95 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -444.1 MB). Free memory was 1.4 GB in the beginning and 999.7 MB in the end (delta: 436.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:53:49,511 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 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.49 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 26.04 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 228.53 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 258254.95 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -444.1 MB). Free memory was 1.4 GB in the beginning and 999.7 MB in the end (delta: 436.4 MB). There was no memory consumed. 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 (34states) and FLOYD_HOARE automaton (currently 9 states, 11 states before enhancement), while ReachableStatesComputation was computing reachable states (20 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 258.1s OverallTime, 383 OverallIterations, 8 TraceHistogramMax, 133.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1532 SDtfs, 2944 SDslu, 5254 SDs, 0 SdLazy, 8920 SolverSat, 4954 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9216 GetRequests, 6271 SyntacticMatches, 0 SemanticMatches, 2945 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=256, 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: 68.8s AutomataMinimizationTime, 382 MinimizatonAttempts, 5658 StatesRemovedByMinimization, 382 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 39.2s InterpolantComputationTime, 12543 NumberOfCodeBlocks, 12543 NumberOfCodeBlocksAsserted, 2169 NumberOfCheckSat, 11778 ConstructedInterpolants, 0 QuantifiedInterpolants, 538536 SizeOfPredicates, 382 NumberOfNonLiveVariables, 16248 ConjunctsInSsa, 3326 ConjunctsInUnsatCore, 765 InterpolantComputations, 1 PerfectInterpolantSequences, 0/35828 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-0-2018-09-23_19-53-49-519.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-0-2018-09-23_19-53-49-519.csv Completed graceful shutdown