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/DivisibilityInterpolantRequired01-BackwardSuccess.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:28:03,780 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:28:03,782 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:28:03,798 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:28:03,798 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:28:03,800 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:28:03,802 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:28:03,804 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:28:03,806 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:28:03,807 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:28:03,810 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:28:03,844 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 [2018-09-26 21:28:03,859 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:28:03,859 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:28:03,860 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:28:03,860 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:28:03,861 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:28:03,861 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:28:03,861 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:28:03,861 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:28:03,861 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:28:03,862 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:28:03,862 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:28:03,862 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:28:03,862 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:28:03,862 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:28:03,863 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:28:03,863 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:28:03,863 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:28:03,863 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:28:03,863 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:28:03,864 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:28:03,864 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:28:03,864 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:28:03,864 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:28:03,864 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:28:03,865 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:28:03,865 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:28:03,865 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:28:03,865 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:28:03,865 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:28:03,865 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:28:03,914 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:28:03,929 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:28:03,934 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:28:03,936 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:28:03,936 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:28:03,937 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-09-26 21:28:03,938 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/DivisibilityInterpolantRequired01-BackwardSuccess.bpl' [2018-09-26 21:28:03,988 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:28:03,991 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:28:03,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:28:03,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:28:03,992 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:28:04,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:03" (1/1) ... [2018-09-26 21:28:04,026 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:03" (1/1) ... [2018-09-26 21:28:04,031 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:28:04,031 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:28:04,032 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:28:04,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:28:04,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:28:04,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:28:04,035 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:28:04,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:03" (1/1) ... [2018-09-26 21:28:04,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:03" (1/1) ... [2018-09-26 21:28:04,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:03" (1/1) ... [2018-09-26 21:28:04,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:03" (1/1) ... [2018-09-26 21:28:04,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:03" (1/1) ... [2018-09-26 21:28:04,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:03" (1/1) ... [2018-09-26 21:28:04,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:03" (1/1) ... [2018-09-26 21:28:04,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:28:04,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:28:04,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:28:04,056 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:28:04,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:03" (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 [2018-09-26 21:28:04,134 INFO L130 BoogieDeclarations]: Found specification of procedure proc [2018-09-26 21:28:04,135 INFO L138 BoogieDeclarations]: Found implementation of procedure proc [2018-09-26 21:28:04,317 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:28:04,318 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:28:04 BoogieIcfgContainer [2018-09-26 21:28:04,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:28:04,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:28:04,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:28:04,324 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:28:04,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:28:03" (1/2) ... [2018-09-26 21:28:04,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e75c09 and model type DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:28:04, skipping insertion in model container [2018-09-26 21:28:04,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:28:04" (2/2) ... [2018-09-26 21:28:04,333 INFO L112 eAbstractionObserver]: Analyzing ICFG DivisibilityInterpolantRequired01-BackwardSuccess.bpl [2018-09-26 21:28:04,344 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:28:04,354 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:28:04,405 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:28:04,406 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:28:04,406 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:28:04,407 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:28:04,407 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:28:04,407 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:28:04,407 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:28:04,408 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:28:04,408 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:28:04,425 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-26 21:28:04,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-26 21:28:04,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:04,433 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-26 21:28:04,435 INFO L423 AbstractCegarLoop]: === Iteration 1 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:04,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:04,442 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-26 21:28:04,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:04,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:04,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:04,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:04,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:04,705 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:28:04,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-26 21:28:04,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:28:04,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:28:04,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:28:04,724 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-26 21:28:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:04,786 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:28:04,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:28:04,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-26 21:28:04,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:04,800 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:28:04,801 INFO L226 Difference]: Without dead ends: 4 [2018-09-26 21:28:04,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:28:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-26 21:28:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-26 21:28:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-26 21:28:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-26 21:28:04,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-26 21:28:04,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:04,884 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-26 21:28:04,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:28:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-26 21:28:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:28:04,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:04,887 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:28:04,888 INFO L423 AbstractCegarLoop]: === Iteration 2 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:04,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:04,888 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-26 21:28:04,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:04,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:04,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:04,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:04,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:05,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:05,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:05,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:05,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:05,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:05,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:05,096 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2018-09-26 21:28:05,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:28:05,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:28:05,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:28:05,098 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 4 states. [2018-09-26 21:28:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:05,128 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-26 21:28:05,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:28:05,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2018-09-26 21:28:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:05,129 INFO L225 Difference]: With dead ends: 6 [2018-09-26 21:28:05,129 INFO L226 Difference]: Without dead ends: 5 [2018-09-26 21:28:05,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:28:05,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-26 21:28:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-26 21:28:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-26 21:28:05,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-26 21:28:05,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-26 21:28:05,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:05,135 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-26 21:28:05,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:28:05,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-26 21:28:05,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:28:05,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:05,136 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-26 21:28:05,136 INFO L423 AbstractCegarLoop]: === Iteration 3 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:05,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:05,136 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-26 21:28:05,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:05,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:05,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:05,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:05,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:05,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:05,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:05,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:05,240 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:05,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:05,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:05,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:05,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:28:05,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:28:05,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:28:05,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:28:05,285 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-26 21:28:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:05,328 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-26 21:28:05,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:28:05,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-26 21:28:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:05,329 INFO L225 Difference]: With dead ends: 7 [2018-09-26 21:28:05,329 INFO L226 Difference]: Without dead ends: 6 [2018-09-26 21:28:05,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:28:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-26 21:28:05,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-26 21:28:05,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:28:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-26 21:28:05,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-26 21:28:05,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:05,333 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-26 21:28:05,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:28:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-26 21:28:05,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:28:05,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:05,334 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-26 21:28:05,334 INFO L423 AbstractCegarLoop]: === Iteration 4 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:05,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:05,335 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-26 21:28:05,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:05,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:05,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:05,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:05,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:05,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:05,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:05,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:05,691 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:28:05,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:05,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:05,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:05,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:28:05,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:28:05,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:28:05,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:28:05,744 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-26 21:28:05,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:05,839 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-26 21:28:05,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:28:05,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-26 21:28:05,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:05,840 INFO L225 Difference]: With dead ends: 8 [2018-09-26 21:28:05,840 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:28:05,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:28:05,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:28:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:28:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:28:05,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:28:05,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-26 21:28:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:05,845 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:28:05,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:28:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:28:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:28:05,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:05,846 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-26 21:28:05,846 INFO L423 AbstractCegarLoop]: === Iteration 5 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:05,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:05,847 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-26 21:28:05,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:05,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:05,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:05,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:05,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:05,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:05,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:06,008 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:06,013 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:06,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:06,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:06,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:06,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:28:06,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:28:06,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:28:06,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:28:06,048 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-26 21:28:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:06,215 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:28:06,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:28:06,216 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-26 21:28:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:06,216 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:28:06,217 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:28:06,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:28:06,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:28:06,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:28:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:28:06,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-26 21:28:06,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-26 21:28:06,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:06,221 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-26 21:28:06,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:28:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-26 21:28:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:28:06,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:06,222 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-26 21:28:06,223 INFO L423 AbstractCegarLoop]: === Iteration 6 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:06,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-26 21:28:06,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:06,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:06,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:06,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:06,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:06,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:06,388 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 [2018-09-26 21:28:06,398 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:06,410 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:28:06,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:06,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:06,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:06,439 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:28:06,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:28:06,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:28:06,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:28:06,441 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-26 21:28:06,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:06,560 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-26 21:28:06,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:28:06,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-26 21:28:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:06,562 INFO L225 Difference]: With dead ends: 10 [2018-09-26 21:28:06,562 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:28:06,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:28:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:28:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:28:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:28:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:28:06,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-26 21:28:06,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:06,568 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:28:06,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:28:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:28:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:28:06,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:06,569 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-26 21:28:06,569 INFO L423 AbstractCegarLoop]: === Iteration 7 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:06,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:06,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-26 21:28:06,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:06,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:06,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:06,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:06,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:07,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:07,083 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 [2018-09-26 21:28:07,094 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:07,100 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:28:07,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:07,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:07,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:07,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:28:07,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:28:07,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:28:07,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:28:07,136 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-26 21:28:07,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:07,284 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:28:07,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:28:07,285 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-26 21:28:07,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:07,286 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:28:07,286 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:28:07,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:28:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:28:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:28:07,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:28:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-26 21:28:07,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-26 21:28:07,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:07,292 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-26 21:28:07,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:28:07,292 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-26 21:28:07,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:28:07,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:07,293 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-26 21:28:07,293 INFO L423 AbstractCegarLoop]: === Iteration 8 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:07,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:07,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-26 21:28:07,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:07,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:07,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:07,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:07,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:07,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:07,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:07,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:07,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:07,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:07,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:28:07,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:28:07,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:28:07,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:28:07,512 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-26 21:28:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:07,633 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-26 21:28:07,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:28:07,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-26 21:28:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:07,635 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:28:07,635 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:28:07,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:28:07,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:28:07,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:28:07,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:28:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:28:07,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-26 21:28:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:07,640 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:28:07,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:28:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:28:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:28:07,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:07,641 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-26 21:28:07,641 INFO L423 AbstractCegarLoop]: === Iteration 9 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:07,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:07,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-26 21:28:07,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:07,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:07,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:07,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:07,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:07,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:07,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:07,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:07,947 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:07,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:07,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:07,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:07,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:28:07,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:28:07,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:28:07,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:28:07,992 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-26 21:28:08,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:08,138 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:28:08,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:28:08,138 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-26 21:28:08,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:08,139 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:28:08,139 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:28:08,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:28:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:28:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-26 21:28:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:28:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-26 21:28:08,143 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-26 21:28:08,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:08,144 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-26 21:28:08,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:28:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-26 21:28:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:28:08,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:08,144 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-26 21:28:08,145 INFO L423 AbstractCegarLoop]: === Iteration 10 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:08,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:08,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-26 21:28:08,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:08,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:08,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:08,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:08,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:08,316 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:08,316 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:08,324 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:08,337 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:28:08,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:08,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:08,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:08,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:28:08,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:28:08,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:28:08,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:28:08,398 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-26 21:28:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:08,522 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-26 21:28:08,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:28:08,523 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-26 21:28:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:08,523 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:28:08,524 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:28:08,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:28:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:28:08,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:28:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:28:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:28:08,528 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-26 21:28:08,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:08,528 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:28:08,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:28:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:28:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:28:08,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:08,529 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-26 21:28:08,529 INFO L423 AbstractCegarLoop]: === Iteration 11 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:08,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:08,530 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-26 21:28:08,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:08,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:08,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:08,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:08,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:08,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:08,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:08,695 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:08,710 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:08,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:08,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:08,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:08,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:28:08,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:28:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:28:08,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:28:08,761 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-26 21:28:08,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:08,897 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:28:08,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:28:08,897 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-26 21:28:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:08,898 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:28:08,899 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:28:08,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:28:08,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:28:08,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:28:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:28:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-26 21:28:08,904 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-26 21:28:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:08,904 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-26 21:28:08,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:28:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-26 21:28:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:28:08,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:08,905 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-26 21:28:08,906 INFO L423 AbstractCegarLoop]: === Iteration 12 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:08,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:08,906 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-26 21:28:08,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:08,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:08,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:08,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:08,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:09,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:09,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:09,147 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:09,173 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:28:09,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:09,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:09,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:09,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:28:09,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:28:09,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:28:09,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:28:09,216 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-26 21:28:09,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:09,573 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-26 21:28:09,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:28:09,573 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-26 21:28:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:09,574 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:28:09,574 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:28:09,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:28:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:28:09,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:28:09,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:28:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:28:09,579 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-26 21:28:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:09,579 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:28:09,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:28:09,579 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:28:09,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:28:09,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:09,580 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-26 21:28:09,580 INFO L423 AbstractCegarLoop]: === Iteration 13 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:09,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:09,581 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-26 21:28:09,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:09,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:09,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:09,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:09,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:09,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:09,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:09,874 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:09,883 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:28:09,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:09,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:09,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:09,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:28:09,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:28:09,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:28:09,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:28:09,930 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-26 21:28:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:10,102 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:28:10,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:28:10,103 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-26 21:28:10,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:10,104 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:28:10,104 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:28:10,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:28:10,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:28:10,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:28:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:28:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-26 21:28:10,110 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-26 21:28:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:10,110 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-26 21:28:10,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:28:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-26 21:28:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:28:10,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:10,111 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-26 21:28:10,111 INFO L423 AbstractCegarLoop]: === Iteration 14 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:10,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:10,111 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-26 21:28:10,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:10,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:10,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:10,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:10,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:10,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:10,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:10,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:10,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:10,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:10,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:28:10,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:28:10,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:28:10,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:28:10,435 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-26 21:28:10,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:10,695 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-26 21:28:10,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:28:10,696 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-26 21:28:10,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:10,697 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:28:10,697 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:28:10,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:28:10,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:28:10,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:28:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:28:10,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:28:10,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-26 21:28:10,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:10,703 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:28:10,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:28:10,703 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:28:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:28:10,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:10,704 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-26 21:28:10,704 INFO L423 AbstractCegarLoop]: === Iteration 15 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:10,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:10,704 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-26 21:28:10,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:10,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:10,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:10,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:10,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:10,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:10,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:10,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:11,017 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:11,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:11,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:11,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:11,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:28:11,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:28:11,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:28:11,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:28:11,084 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-26 21:28:11,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:11,441 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:28:11,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:28:11,442 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-26 21:28:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:11,443 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:28:11,443 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:28:11,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:28:11,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:28:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-26 21:28:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:28:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-26 21:28:11,448 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-26 21:28:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:11,448 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-26 21:28:11,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:28:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-26 21:28:11,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:28:11,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:11,449 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-26 21:28:11,450 INFO L423 AbstractCegarLoop]: === Iteration 16 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:11,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:11,450 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-26 21:28:11,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:11,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:11,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:11,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:11,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:11,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:11,710 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 [2018-09-26 21:28:11,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:11,738 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:28:11,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:11,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:11,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:11,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:28:11,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:28:11,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:28:11,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:28:11,776 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-26 21:28:11,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:11,975 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-26 21:28:11,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:28:11,975 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-26 21:28:11,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:11,976 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:28:11,976 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:28:11,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:28:11,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:28:11,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:28:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:28:11,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:28:11,981 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-26 21:28:11,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:11,981 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:28:11,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:28:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:28:11,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:28:11,982 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:11,982 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-26 21:28:11,983 INFO L423 AbstractCegarLoop]: === Iteration 17 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:11,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:11,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-26 21:28:11,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:11,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:11,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:11,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:11,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:12,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:12,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:12,381 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:12,389 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:12,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:12,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:12,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:12,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:28:12,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:28:12,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:28:12,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:28:12,437 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-26 21:28:12,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:12,717 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:28:12,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:28:12,717 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-26 21:28:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:12,718 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:28:12,718 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:28:12,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:28:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:28:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:28:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:28:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-26 21:28:12,724 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-26 21:28:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:12,725 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-26 21:28:12,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:28:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-26 21:28:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:28:12,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:12,726 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-26 21:28:12,726 INFO L423 AbstractCegarLoop]: === Iteration 18 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:12,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:12,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-26 21:28:12,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:12,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:12,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:12,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:12,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:13,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:13,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:13,198 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:13,211 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:28:13,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:13,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:13,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:13,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:28:13,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:28:13,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:28:13,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:28:13,251 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-26 21:28:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:13,545 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-26 21:28:13,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:28:13,546 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-26 21:28:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:13,547 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:28:13,547 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:28:13,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:28:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:28:13,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:28:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:28:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:28:13,553 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-26 21:28:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:13,553 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:28:13,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:28:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:28:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:28:13,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:13,554 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-26 21:28:13,554 INFO L423 AbstractCegarLoop]: === Iteration 19 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:13,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-26 21:28:13,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:13,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:13,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:13,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:13,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:13,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:13,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:13,980 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:14,023 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:28:14,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:14,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:14,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:14,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:28:14,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:28:14,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:28:14,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:28:14,066 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-26 21:28:14,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:14,417 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:28:14,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:28:14,418 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-26 21:28:14,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:14,419 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:28:14,419 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:28:14,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:28:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:28:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-26 21:28:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:28:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-26 21:28:14,424 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-26 21:28:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:14,424 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-26 21:28:14,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:28:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-26 21:28:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:28:14,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:14,425 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-26 21:28:14,426 INFO L423 AbstractCegarLoop]: === Iteration 20 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:14,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:14,426 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-26 21:28:14,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:14,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:14,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:14,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:14,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:14,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:14,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:14,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:15,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:15,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:15,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:28:15,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:28:15,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:28:15,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:28:15,068 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-26 21:28:15,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:15,408 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-26 21:28:15,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:28:15,409 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-26 21:28:15,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:15,410 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:28:15,410 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:28:15,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:28:15,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:28:15,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:28:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:28:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:28:15,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-26 21:28:15,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:15,416 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:28:15,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:28:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:28:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:28:15,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:15,417 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-26 21:28:15,418 INFO L423 AbstractCegarLoop]: === Iteration 21 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:15,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:15,418 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-26 21:28:15,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:15,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:15,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:15,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:15,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:16,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:16,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:16,194 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:16,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:16,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:16,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:16,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:16,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:28:16,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:28:16,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:28:16,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:28:16,236 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-26 21:28:16,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:16,588 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:28:16,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:28:16,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-26 21:28:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:16,589 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:28:16,589 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:28:16,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:28:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:28:16,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-26 21:28:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:28:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-26 21:28:16,594 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-26 21:28:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:16,594 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-26 21:28:16,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:28:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-26 21:28:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:28:16,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:16,595 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-26 21:28:16,595 INFO L423 AbstractCegarLoop]: === Iteration 22 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:16,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:16,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-26 21:28:16,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:16,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:16,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:16,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:16,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:17,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:17,047 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 [2018-09-26 21:28:17,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:17,070 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:28:17,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:17,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:17,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:17,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:28:17,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:28:17,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:28:17,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:28:17,110 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-26 21:28:17,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:17,516 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-26 21:28:17,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:28:17,518 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-26 21:28:17,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:17,519 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:28:17,519 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:28:17,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:28:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:28:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:28:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:28:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:28:17,524 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-26 21:28:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:17,524 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:28:17,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:28:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:28:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:28:17,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:17,525 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-26 21:28:17,525 INFO L423 AbstractCegarLoop]: === Iteration 23 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:17,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:17,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-26 21:28:17,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:17,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:17,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:17,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:17,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:17,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:17,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:17,996 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:18,004 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:18,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:18,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:18,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:18,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:28:18,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:28:18,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:28:18,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:28:18,066 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-26 21:28:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:18,542 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:28:18,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:28:18,542 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-26 21:28:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:18,543 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:28:18,543 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:28:18,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:28:18,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:28:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 21:28:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:28:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-26 21:28:18,548 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-26 21:28:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:18,549 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-26 21:28:18,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:28:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-26 21:28:18,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:28:18,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:18,550 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-26 21:28:18,550 INFO L423 AbstractCegarLoop]: === Iteration 24 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:18,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:18,550 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-26 21:28:18,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:18,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:18,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:18,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:18,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:18,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:18,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:18,978 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:18,990 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:28:18,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:18,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:19,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:19,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:28:19,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:28:19,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:28:19,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:28:19,035 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-26 21:28:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:19,970 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-26 21:28:19,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:28:19,970 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-26 21:28:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:19,971 INFO L225 Difference]: With dead ends: 28 [2018-09-26 21:28:19,971 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:28:19,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:28:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:28:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:28:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:28:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:28:19,976 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-26 21:28:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:19,977 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:28:19,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:28:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:28:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:28:19,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:19,980 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-26 21:28:19,981 INFO L423 AbstractCegarLoop]: === Iteration 25 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:19,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:19,981 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-26 21:28:19,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:19,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:19,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:19,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:19,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:20,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:20,507 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 [2018-09-26 21:28:20,515 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:20,527 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:28:20,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:20,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:20,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:20,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:28:20,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:28:20,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:28:20,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:28:20,565 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-26 21:28:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:21,057 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:28:21,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:28:21,058 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-26 21:28:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:21,059 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:28:21,059 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:28:21,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:28:21,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:28:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-26 21:28:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:28:21,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-26 21:28:21,066 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-26 21:28:21,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:21,066 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-26 21:28:21,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:28:21,066 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-26 21:28:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:28:21,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:21,067 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-26 21:28:21,067 INFO L423 AbstractCegarLoop]: === Iteration 26 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:21,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:21,068 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-26 21:28:21,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:21,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:21,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:21,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:21,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:21,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:21,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:21,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:21,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:21,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:21,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:28:21,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:28:21,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:28:21,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:28:21,575 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-26 21:28:22,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:22,078 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-26 21:28:22,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:28:22,079 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-26 21:28:22,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:22,080 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:28:22,080 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:28:22,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:28:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:28:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:28:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:28:22,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:28:22,085 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-26 21:28:22,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:22,086 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:28:22,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:28:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:28:22,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:28:22,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:22,088 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-26 21:28:22,088 INFO L423 AbstractCegarLoop]: === Iteration 27 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:22,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:22,088 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-26 21:28:22,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:22,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:22,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:22,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:22,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:22,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:22,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:22,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:22,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:22,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:22,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:22,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:22,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:28:22,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:28:22,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:28:22,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:28:22,635 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-26 21:28:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:23,175 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:28:23,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:28:23,175 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-26 21:28:23,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:23,176 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:28:23,176 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:28:23,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:28:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:28:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-26 21:28:23,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:28:23,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-26 21:28:23,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-26 21:28:23,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:23,180 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-26 21:28:23,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:28:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-26 21:28:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:28:23,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:23,180 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-26 21:28:23,181 INFO L423 AbstractCegarLoop]: === Iteration 28 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:23,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:23,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-26 21:28:23,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:23,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:23,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:23,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:23,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:23,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:23,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:23,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:23,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:28:23,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:23,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:23,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:23,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:28:23,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:28:23,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:28:23,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:28:23,871 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-26 21:28:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:24,576 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-26 21:28:24,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:28:24,576 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-26 21:28:24,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:24,577 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:28:24,577 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:28:24,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:28:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:28:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:28:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:28:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:28:24,583 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-26 21:28:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:24,583 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:28:24,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:28:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:28:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:28:24,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:24,584 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-26 21:28:24,584 INFO L423 AbstractCegarLoop]: === Iteration 29 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:24,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:24,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-26 21:28:24,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:24,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:24,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:24,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:24,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:25,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:25,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:25,508 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:25,517 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:25,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:25,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:25,539 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:25,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:25,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:28:25,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:28:25,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:28:25,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:28:25,572 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-26 21:28:26,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:26,150 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:28:26,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:28:26,151 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-26 21:28:26,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:26,152 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:28:26,152 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:28:26,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:28:26,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:28:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 21:28:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:28:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-26 21:28:26,158 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-26 21:28:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:26,158 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-26 21:28:26,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:28:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-26 21:28:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 21:28:26,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:26,159 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-26 21:28:26,159 INFO L423 AbstractCegarLoop]: === Iteration 30 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:26,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-26 21:28:26,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:26,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:26,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:26,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:26,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:27,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:27,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:27,622 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:27,638 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:28:27,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:27,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:27,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:27,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:28:27,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:28:27,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:28:27,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:28:27,684 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-26 21:28:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:28,430 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-26 21:28:28,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:28:28,431 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-26 21:28:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:28,431 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:28:28,431 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:28:28,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:28:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:28:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:28:28,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:28:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:28:28,437 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-26 21:28:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:28,437 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:28:28,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:28:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:28:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:28:28,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:28,438 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-26 21:28:28,438 INFO L423 AbstractCegarLoop]: === Iteration 31 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:28,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:28,439 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-26 21:28:28,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:28,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:28,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:28,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:28,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:29,098 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:29,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:29,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:29,107 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:29,126 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:28:29,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:29,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:29,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:29,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:28:29,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:28:29,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:28:29,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:28:29,212 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-26 21:28:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:29,838 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:28:29,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:28:29,838 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-26 21:28:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:29,839 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:28:29,839 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:28:29,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:28:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:28:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-26 21:28:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:28:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-26 21:28:29,845 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-26 21:28:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:29,845 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-26 21:28:29,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:28:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-26 21:28:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:28:29,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:29,846 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-26 21:28:29,846 INFO L423 AbstractCegarLoop]: === Iteration 32 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:29,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:29,846 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-26 21:28:29,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:29,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:29,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:29,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:29,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:30,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:30,865 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 [2018-09-26 21:28:30,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:30,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:30,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:30,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:28:30,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:28:30,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:28:30,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:28:30,923 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-26 21:28:31,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:31,657 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-26 21:28:31,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:28:31,658 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-26 21:28:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:31,658 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:28:31,659 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:28:31,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:28:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:28:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:28:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:28:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:28:31,665 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-26 21:28:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:31,665 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:28:31,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:28:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:28:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:28:31,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:31,666 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-26 21:28:31,666 INFO L423 AbstractCegarLoop]: === Iteration 33 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:31,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:31,666 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-26 21:28:31,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:31,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:31,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:31,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:31,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:32,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:32,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:32,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:32,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:32,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:32,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:32,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:32,461 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:28:32,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:28:32,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:28:32,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:28:32,462 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-26 21:28:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:33,496 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:28:33,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:28:33,496 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-26 21:28:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:33,497 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:28:33,497 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:28:33,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:28:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:28:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-26 21:28:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:28:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-26 21:28:33,502 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-26 21:28:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:33,502 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-26 21:28:33,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:28:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-26 21:28:33,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:28:33,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:33,503 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-26 21:28:33,503 INFO L423 AbstractCegarLoop]: === Iteration 34 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:33,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:33,503 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-26 21:28:33,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:33,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:33,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:33,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:33,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:34,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:34,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:34,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:34,320 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:28:34,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:34,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:34,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:34,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:28:34,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:28:34,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:28:34,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:28:34,362 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-26 21:28:35,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:35,145 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-26 21:28:35,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:28:35,145 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-26 21:28:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:35,146 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:28:35,146 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:28:35,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:28:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:28:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:28:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:28:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-26 21:28:35,151 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-26 21:28:35,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:35,151 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-26 21:28:35,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:28:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-26 21:28:35,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:28:35,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:35,152 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-26 21:28:35,152 INFO L423 AbstractCegarLoop]: === Iteration 35 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:35,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:35,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-26 21:28:35,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:35,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:35,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:35,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:35,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:36,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:36,151 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 [2018-09-26 21:28:36,158 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:36,170 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:36,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:36,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:36,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:36,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:28:36,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:28:36,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:28:36,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:28:36,213 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-26 21:28:37,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:37,111 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:28:37,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:28:37,111 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-26 21:28:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:37,112 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:28:37,112 INFO L226 Difference]: Without dead ends: 38 [2018-09-26 21:28:37,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:28:37,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-26 21:28:37,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-26 21:28:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:28:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-26 21:28:37,117 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-26 21:28:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:37,117 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-26 21:28:37,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:28:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-26 21:28:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:28:37,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:37,118 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-26 21:28:37,118 INFO L423 AbstractCegarLoop]: === Iteration 36 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:37,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:37,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-26 21:28:37,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:37,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:37,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:37,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:37,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:37,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:37,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:37,951 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:37,968 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:28:37,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:37,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:37,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:38,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:28:38,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:28:38,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:28:38,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:28:38,001 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-26 21:28:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:38,969 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-26 21:28:38,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:28:38,970 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-26 21:28:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:38,970 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:28:38,971 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:28:38,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:28:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:28:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:28:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:28:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:28:38,975 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-26 21:28:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:38,975 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:28:38,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:28:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:28:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:28:38,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:38,976 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-26 21:28:38,977 INFO L423 AbstractCegarLoop]: === Iteration 37 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:38,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:38,977 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-26 21:28:38,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:38,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:38,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:38,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:38,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:40,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:40,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:40,030 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:40,050 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:28:40,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:40,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:40,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:40,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:28:40,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:28:40,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:28:40,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:28:40,085 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-26 21:28:40,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:40,994 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:28:40,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:28:40,995 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-26 21:28:40,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:40,996 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:28:40,996 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:28:40,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:28:40,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:28:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:28:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:28:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-26 21:28:41,001 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-26 21:28:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:41,001 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-26 21:28:41,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:28:41,002 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-26 21:28:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-26 21:28:41,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:41,002 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-26 21:28:41,003 INFO L423 AbstractCegarLoop]: === Iteration 38 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:41,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:41,003 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-26 21:28:41,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:41,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:41,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:41,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:41,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:41,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:41,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:41,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:41,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:41,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:41,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:28:41,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:28:41,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:28:41,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:28:41,857 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-26 21:28:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:42,794 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-26 21:28:42,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:28:42,795 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-26 21:28:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:42,795 INFO L225 Difference]: With dead ends: 42 [2018-09-26 21:28:42,795 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:28:42,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:28:42,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:28:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:28:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:28:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-26 21:28:42,800 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-26 21:28:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:42,800 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-26 21:28:42,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:28:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-26 21:28:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:28:42,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:42,801 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-26 21:28:42,801 INFO L423 AbstractCegarLoop]: === Iteration 39 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:42,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:42,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-26 21:28:42,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:42,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:42,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:42,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:42,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:44,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:44,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:44,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:44,375 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:44,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:44,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:44,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:44,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:28:44,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:28:44,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:28:44,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:28:44,415 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-26 21:28:45,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:45,416 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:28:45,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:28:45,416 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-26 21:28:45,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:45,417 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:28:45,417 INFO L226 Difference]: Without dead ends: 42 [2018-09-26 21:28:45,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:28:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-26 21:28:45,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-26 21:28:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-26 21:28:45,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-26 21:28:45,422 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-26 21:28:45,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:45,422 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-26 21:28:45,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:28:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-26 21:28:45,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-26 21:28:45,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:45,423 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-26 21:28:45,424 INFO L423 AbstractCegarLoop]: === Iteration 40 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:45,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:45,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-26 21:28:45,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:45,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:45,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:45,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:45,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:46,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:46,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:46,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:28:46,439 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:28:46,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:46,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:46,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:46,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:28:46,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:28:46,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:28:46,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:28:46,481 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-26 21:28:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:47,513 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-26 21:28:47,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:28:47,514 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-26 21:28:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:47,515 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:28:47,515 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:28:47,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:28:47,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:28:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:28:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:28:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:28:47,519 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-26 21:28:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:47,519 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:28:47,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:28:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:28:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:28:47,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:47,520 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-26 21:28:47,520 INFO L423 AbstractCegarLoop]: === Iteration 41 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:47,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:47,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-26 21:28:47,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:47,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:47,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:47,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:47,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:48,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:48,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:48,473 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:28:48,487 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:28:48,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:48,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:48,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:48,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:28:48,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:28:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:28:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:28:48,520 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-26 21:28:49,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:49,759 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:28:49,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:28:49,760 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-26 21:28:49,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:49,760 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:28:49,760 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:28:49,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:28:49,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:28:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-26 21:28:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:28:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-26 21:28:49,766 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-26 21:28:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:49,766 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-26 21:28:49,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:28:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-26 21:28:49,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:28:49,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:49,767 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-26 21:28:49,767 INFO L423 AbstractCegarLoop]: === Iteration 42 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:49,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:49,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-26 21:28:49,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:49,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:49,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:49,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:49,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:51,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:51,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:51,937 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:28:51,958 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:28:51,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:51,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:51,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:51,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-26 21:28:51,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:28:51,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:28:51,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:28:51,993 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-26 21:28:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:53,120 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-26 21:28:53,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:28:53,120 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-26 21:28:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:53,121 INFO L225 Difference]: With dead ends: 46 [2018-09-26 21:28:53,121 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:28:53,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:28:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:28:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:28:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:28:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-26 21:28:53,125 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-26 21:28:53,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:53,125 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-26 21:28:53,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:28:53,125 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-26 21:28:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:28:53,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:53,126 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-26 21:28:53,126 INFO L423 AbstractCegarLoop]: === Iteration 43 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:53,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-26 21:28:53,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:53,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:53,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:53,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:53,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:54,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:54,347 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 [2018-09-26 21:28:54,355 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:28:54,375 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-26 21:28:54,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:54,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:54,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:54,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:28:54,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:28:54,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:28:54,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:28:54,413 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-26 21:28:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:55,635 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:28:55,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:28:55,635 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-26 21:28:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:55,636 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:28:55,636 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:28:55,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:28:55,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:28:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:28:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:28:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-26 21:28:55,640 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-26 21:28:55,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:55,640 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-26 21:28:55,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:28:55,640 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-26 21:28:55,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-26 21:28:55,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:55,641 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-26 21:28:55,641 INFO L423 AbstractCegarLoop]: === Iteration 44 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:55,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:55,641 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-26 21:28:55,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:55,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:55,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:55,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:28:55,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:56,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:56,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:28:56,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:56,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:56,892 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:56,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-26 21:28:56,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:28:56,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:28:56,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:28:56,894 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-26 21:28:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:28:58,135 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-26 21:28:58,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:28:58,136 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-26 21:28:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:28:58,137 INFO L225 Difference]: With dead ends: 48 [2018-09-26 21:28:58,137 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:28:58,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:28:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:28:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:28:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:28:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:28:58,141 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-26 21:28:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:28:58,141 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:28:58,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:28:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:28:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:28:58,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:28:58,142 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1] [2018-09-26 21:28:58,142 INFO L423 AbstractCegarLoop]: === Iteration 45 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:28:58,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:28:58,142 INFO L82 PathProgramCache]: Analyzing trace with hash 667835207, now seen corresponding path program 44 times [2018-09-26 21:28:58,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:28:58,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:28:58,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:58,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:28:58,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:28:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:28:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:59,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:28:59,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:28:59,532 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:28:59,547 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:28:59,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:28:59,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:28:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:28:59,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:28:59,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:28:59,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:28:59,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:28:59,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:28:59,581 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-26 21:29:00,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:00,878 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:29:00,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:29:00,880 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-26 21:29:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:00,881 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:29:00,881 INFO L226 Difference]: Without dead ends: 48 [2018-09-26 21:29:00,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:29:00,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-26 21:29:00,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-26 21:29:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-26 21:29:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-26 21:29:00,884 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-26 21:29:00,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:00,884 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-26 21:29:00,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:29:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-26 21:29:00,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:29:00,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:00,884 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1] [2018-09-26 21:29:00,885 INFO L423 AbstractCegarLoop]: === Iteration 46 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:00,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:00,885 INFO L82 PathProgramCache]: Analyzing trace with hash -771945119, now seen corresponding path program 45 times [2018-09-26 21:29:00,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:00,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:00,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:00,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:00,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:02,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:02,085 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 [2018-09-26 21:29:02,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:02,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:29:02,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:02,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:02,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:02,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-26 21:29:02,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:29:02,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:29:02,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:29:02,172 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-26 21:29:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:03,525 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-26 21:29:03,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:29:03,525 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-26 21:29:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:03,526 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:29:03,526 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:29:03,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:29:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:29:03,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:29:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:29:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-26 21:29:03,531 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-26 21:29:03,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:03,531 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-26 21:29:03,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:29:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-26 21:29:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:29:03,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:03,532 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1] [2018-09-26 21:29:03,532 INFO L423 AbstractCegarLoop]: === Iteration 47 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:03,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505031, now seen corresponding path program 46 times [2018-09-26 21:29:03,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:03,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:03,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:03,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:03,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:04,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:04,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:04,960 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:04,975 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:04,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:04,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:05,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:05,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:29:05,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:29:05,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:29:05,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:29:05,010 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-26 21:29:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:06,419 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:29:06,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:29:06,419 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-26 21:29:06,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:06,420 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:29:06,420 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:29:06,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:29:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:29:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-26 21:29:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:29:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-26 21:29:06,425 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-26 21:29:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:06,425 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-26 21:29:06,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:29:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-26 21:29:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-26 21:29:06,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:06,426 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1] [2018-09-26 21:29:06,426 INFO L423 AbstractCegarLoop]: === Iteration 48 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:06,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:06,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081057, now seen corresponding path program 47 times [2018-09-26 21:29:06,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:06,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:06,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:06,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:06,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:07,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:07,745 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 [2018-09-26 21:29:07,753 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:07,776 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:29:07,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:07,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:07,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:07,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-26 21:29:07,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:29:07,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:29:07,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:29:07,829 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-26 21:29:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:09,627 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-26 21:29:09,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:29:09,628 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-26 21:29:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:09,628 INFO L225 Difference]: With dead ends: 52 [2018-09-26 21:29:09,629 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:29:09,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:29:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:29:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:29:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:29:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-26 21:29:09,632 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-26 21:29:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:09,633 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-26 21:29:09,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:29:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-26 21:29:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:29:09,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:09,634 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1] [2018-09-26 21:29:09,634 INFO L423 AbstractCegarLoop]: === Iteration 49 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:09,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:09,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192953, now seen corresponding path program 48 times [2018-09-26 21:29:09,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:09,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:09,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:09,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:09,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:11,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:11,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:11,096 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:11,119 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:29:11,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:11,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:11,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:11,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:29:11,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:29:11,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:29:11,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:29:11,154 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-26 21:29:12,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:12,716 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:29:12,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:29:12,716 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-26 21:29:12,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:12,717 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:29:12,717 INFO L226 Difference]: Without dead ends: 52 [2018-09-26 21:29:12,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:29:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-26 21:29:12,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-26 21:29:12,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-26 21:29:12,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-26 21:29:12,722 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-26 21:29:12,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:12,722 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-26 21:29:12,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:29:12,722 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-26 21:29:12,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-26 21:29:12,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:12,723 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1] [2018-09-26 21:29:12,723 INFO L423 AbstractCegarLoop]: === Iteration 50 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:12,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:12,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593249, now seen corresponding path program 49 times [2018-09-26 21:29:12,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:12,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:12,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:12,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:12,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:14,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:14,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:14,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:14,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:14,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:14,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-26 21:29:14,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:29:14,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:29:14,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:29:14,100 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-26 21:29:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:15,874 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-26 21:29:15,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:29:15,875 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-26 21:29:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:15,875 INFO L225 Difference]: With dead ends: 54 [2018-09-26 21:29:15,876 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:29:15,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:29:15,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:29:15,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:29:15,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:29:15,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-26 21:29:15,880 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-26 21:29:15,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:15,880 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-26 21:29:15,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:29:15,881 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-26 21:29:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:29:15,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:15,881 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1] [2018-09-26 21:29:15,881 INFO L423 AbstractCegarLoop]: === Iteration 51 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:15,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:15,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1250315001, now seen corresponding path program 50 times [2018-09-26 21:29:15,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:15,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:15,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:15,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:15,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:17,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:17,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:17,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:17,896 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:17,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:17,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:17,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:17,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:29:17,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:29:17,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:29:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:29:17,932 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-26 21:29:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:19,795 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:29:19,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:29:19,796 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-26 21:29:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:19,798 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:29:19,798 INFO L226 Difference]: Without dead ends: 54 [2018-09-26 21:29:19,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:29:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-26 21:29:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-26 21:29:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:29:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-26 21:29:19,802 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-26 21:29:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:19,803 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-26 21:29:19,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:29:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-26 21:29:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:29:19,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:19,803 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1] [2018-09-26 21:29:19,804 INFO L423 AbstractCegarLoop]: === Iteration 52 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:19,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:19,804 INFO L82 PathProgramCache]: Analyzing trace with hash -105059423, now seen corresponding path program 51 times [2018-09-26 21:29:19,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:19,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:19,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:19,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:19,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:21,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:21,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:21,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:21,259 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:29:21,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:21,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:21,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:21,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-26 21:29:21,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:29:21,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:29:21,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:29:21,296 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-26 21:29:23,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:23,087 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-26 21:29:23,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:29:23,087 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-26 21:29:23,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:23,088 INFO L225 Difference]: With dead ends: 56 [2018-09-26 21:29:23,088 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:29:23,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:29:23,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:29:23,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:29:23,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:29:23,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-26 21:29:23,093 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-26 21:29:23,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:23,093 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-26 21:29:23,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:29:23,093 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-26 21:29:23,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:29:23,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:23,094 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1] [2018-09-26 21:29:23,094 INFO L423 AbstractCegarLoop]: === Iteration 53 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:23,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:23,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125127, now seen corresponding path program 52 times [2018-09-26 21:29:23,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:23,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:23,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:23,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:23,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:24,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:24,902 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:24,917 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:24,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:24,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:24,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:24,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:29:24,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:29:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:29:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:29:24,953 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-26 21:29:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:26,739 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:29:26,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:29:26,740 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-26 21:29:26,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:26,741 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:29:26,741 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:29:26,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:29:26,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:29:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:29:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:29:26,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-26 21:29:26,746 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-26 21:29:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:26,747 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-26 21:29:26,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:29:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-26 21:29:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-26 21:29:26,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:26,747 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1] [2018-09-26 21:29:26,748 INFO L423 AbstractCegarLoop]: === Iteration 54 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:26,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:26,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107809, now seen corresponding path program 53 times [2018-09-26 21:29:26,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:26,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:26,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:26,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:26,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:28,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:28,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:28,847 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:28,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:29:28,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:28,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:28,914 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:28,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-26 21:29:28,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:29:28,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:29:28,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:29:28,915 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-26 21:29:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:30,919 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-26 21:29:30,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:29:30,919 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-26 21:29:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:30,920 INFO L225 Difference]: With dead ends: 58 [2018-09-26 21:29:30,920 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:29:30,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:29:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:29:30,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:29:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:29:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-26 21:29:30,925 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-26 21:29:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:30,925 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-26 21:29:30,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:29:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-26 21:29:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:29:30,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:30,926 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1] [2018-09-26 21:29:30,926 INFO L423 AbstractCegarLoop]: === Iteration 55 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:30,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:30,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832583, now seen corresponding path program 54 times [2018-09-26 21:29:30,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:30,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:30,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:30,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:30,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:32,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:32,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:32,519 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:32,545 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-26 21:29:32,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:32,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:32,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:32,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:29:32,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:29:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:29:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:29:32,579 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-26 21:29:34,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:34,487 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:29:34,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:29:34,488 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-26 21:29:34,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:34,489 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:29:34,489 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:29:34,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:29:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:29:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-26 21:29:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-26 21:29:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-26 21:29:34,494 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-26 21:29:34,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:34,494 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-26 21:29:34,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:29:34,494 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-26 21:29:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-26 21:29:34,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:34,495 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1] [2018-09-26 21:29:34,495 INFO L423 AbstractCegarLoop]: === Iteration 56 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:34,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:34,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895647, now seen corresponding path program 55 times [2018-09-26 21:29:34,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:34,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:34,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:34,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:34,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:36,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:36,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:36,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:36,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:36,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:36,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-26 21:29:36,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:29:36,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:29:36,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:29:36,385 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-26 21:29:38,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:38,372 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-26 21:29:38,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:29:38,373 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-26 21:29:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:38,374 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:29:38,374 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:29:38,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:29:38,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:29:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:29:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:29:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-26 21:29:38,379 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-26 21:29:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:38,379 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-26 21:29:38,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:29:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-26 21:29:38,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:29:38,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:38,380 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1] [2018-09-26 21:29:38,380 INFO L423 AbstractCegarLoop]: === Iteration 57 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:38,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:38,380 INFO L82 PathProgramCache]: Analyzing trace with hash -836059449, now seen corresponding path program 56 times [2018-09-26 21:29:38,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:38,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:38,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:38,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:29:38,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:40,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:40,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:40,157 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:29:40,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:29:40,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:40,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:40,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:40,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:29:40,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:29:40,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:29:40,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:29:40,213 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-26 21:29:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:42,294 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:29:42,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:29:42,294 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-26 21:29:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:42,295 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:29:42,295 INFO L226 Difference]: Without dead ends: 60 [2018-09-26 21:29:42,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:29:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-26 21:29:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-26 21:29:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-26 21:29:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-26 21:29:42,302 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-26 21:29:42,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:42,302 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-26 21:29:42,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:29:42,302 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-26 21:29:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-26 21:29:42,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:42,303 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1] [2018-09-26 21:29:42,303 INFO L423 AbstractCegarLoop]: === Iteration 58 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:42,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:42,303 INFO L82 PathProgramCache]: Analyzing trace with hash -148039199, now seen corresponding path program 57 times [2018-09-26 21:29:42,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:42,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:42,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:42,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:42,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:43,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:43,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:43,999 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:29:44,028 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-26 21:29:44,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:44,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:44,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:44,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-26 21:29:44,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:29:44,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:29:44,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:29:44,068 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-26 21:29:46,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:46,421 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-26 21:29:46,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:29:46,421 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-26 21:29:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:46,422 INFO L225 Difference]: With dead ends: 62 [2018-09-26 21:29:46,422 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:29:46,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:29:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:29:46,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:29:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:29:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-26 21:29:46,428 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-26 21:29:46,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:46,428 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-26 21:29:46,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:29:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-26 21:29:46,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:29:46,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:46,429 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1] [2018-09-26 21:29:46,429 INFO L423 AbstractCegarLoop]: === Iteration 59 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:46,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:46,429 INFO L82 PathProgramCache]: Analyzing trace with hash -294247929, now seen corresponding path program 58 times [2018-09-26 21:29:46,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:46,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:46,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:46,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:46,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:48,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:48,717 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 [2018-09-26 21:29:48,728 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:29:48,742 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:29:48,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:48,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:48,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:48,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:29:48,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:29:48,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:29:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:29:48,791 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-26 21:29:51,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:51,630 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-26 21:29:51,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:29:51,631 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-26 21:29:51,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:51,632 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:29:51,632 INFO L226 Difference]: Without dead ends: 62 [2018-09-26 21:29:51,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:29:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-26 21:29:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-26 21:29:51,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-26 21:29:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-26 21:29:51,637 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-26 21:29:51,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:51,637 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-26 21:29:51,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:29:51,637 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-26 21:29:51,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-26 21:29:51,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:51,637 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1] [2018-09-26 21:29:51,637 INFO L423 AbstractCegarLoop]: === Iteration 60 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:51,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:51,638 INFO L82 PathProgramCache]: Analyzing trace with hash -531751263, now seen corresponding path program 59 times [2018-09-26 21:29:51,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:51,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:51,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:51,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:51,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:53,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:53,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:29:53,440 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:29:53,469 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:29:53,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:53,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:53,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:53,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-26 21:29:53,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:29:53,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:29:53,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:29:53,508 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-26 21:29:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:29:55,981 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-26 21:29:55,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:29:55,982 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-26 21:29:55,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:29:55,983 INFO L225 Difference]: With dead ends: 64 [2018-09-26 21:29:55,983 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:29:55,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:29:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:29:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:29:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:29:55,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-26 21:29:55,986 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-26 21:29:55,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:29:55,986 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-26 21:29:55,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:29:55,986 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-26 21:29:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:29:55,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:29:55,987 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1] [2018-09-26 21:29:55,987 INFO L423 AbstractCegarLoop]: === Iteration 61 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:29:55,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:29:55,987 INFO L82 PathProgramCache]: Analyzing trace with hash 695579975, now seen corresponding path program 60 times [2018-09-26 21:29:55,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:29:55,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:29:55,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:55,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:29:55,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:29:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:29:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:58,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:29:58,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:29:58,079 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:29:58,111 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:29:58,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:29:58,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:29:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:29:58,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:29:58,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:29:58,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:29:58,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:29:58,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:29:58,148 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-26 21:30:00,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:00,639 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:30:00,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:30:00,639 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-26 21:30:00,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:00,640 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:30:00,640 INFO L226 Difference]: Without dead ends: 64 [2018-09-26 21:30:00,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:30:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-26 21:30:00,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-26 21:30:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-26 21:30:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-26 21:30:00,643 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-26 21:30:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:00,643 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-26 21:30:00,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:30:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-26 21:30:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-26 21:30:00,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:00,644 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1] [2018-09-26 21:30:00,644 INFO L423 AbstractCegarLoop]: === Iteration 62 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:00,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:00,644 INFO L82 PathProgramCache]: Analyzing trace with hash 88142689, now seen corresponding path program 61 times [2018-09-26 21:30:00,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:00,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:00,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:00,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:00,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:02,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:02,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:02,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:02,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:02,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:02,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-26 21:30:02,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:30:02,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:30:02,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:30:02,579 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-26 21:30:04,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:04,998 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-26 21:30:04,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:30:04,998 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-26 21:30:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:04,999 INFO L225 Difference]: With dead ends: 66 [2018-09-26 21:30:04,999 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:30:05,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:30:05,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:30:05,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:30:05,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:30:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-26 21:30:05,004 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-26 21:30:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:05,004 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-26 21:30:05,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:30:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-26 21:30:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:30:05,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:05,005 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1] [2018-09-26 21:30:05,005 INFO L423 AbstractCegarLoop]: === Iteration 63 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:05,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:05,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543993, now seen corresponding path program 62 times [2018-09-26 21:30:05,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:05,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:05,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:05,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:05,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:07,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:07,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:07,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:07,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:07,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:07,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:07,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:07,355 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:30:07,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:30:07,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:30:07,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:30:07,356 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-26 21:30:09,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:09,916 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-26 21:30:09,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:30:09,916 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-26 21:30:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:09,917 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:30:09,918 INFO L226 Difference]: Without dead ends: 66 [2018-09-26 21:30:09,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:30:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-26 21:30:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-26 21:30:09,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-26 21:30:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-26 21:30:09,922 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-26 21:30:09,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:09,923 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-26 21:30:09,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:30:09,923 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-26 21:30:09,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-26 21:30:09,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:09,924 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1] [2018-09-26 21:30:09,924 INFO L423 AbstractCegarLoop]: === Iteration 64 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:09,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:09,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223583, now seen corresponding path program 63 times [2018-09-26 21:30:09,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:09,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:09,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:09,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:09,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:12,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:12,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:12,193 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:12,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-26 21:30:12,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:12,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:12,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:12,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-26 21:30:12,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:30:12,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:30:12,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:30:12,262 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-26 21:30:14,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:14,846 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-26 21:30:14,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:30:14,846 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-26 21:30:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:14,847 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:30:14,847 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:30:14,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:30:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:30:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:30:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:30:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-26 21:30:14,852 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-26 21:30:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:14,852 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-26 21:30:14,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:30:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-26 21:30:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:30:14,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:14,853 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1] [2018-09-26 21:30:14,853 INFO L423 AbstractCegarLoop]: === Iteration 65 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:14,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:14,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774535, now seen corresponding path program 64 times [2018-09-26 21:30:14,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:14,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:14,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:14,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:14,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:17,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:17,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:17,183 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:17,200 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:17,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:17,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:17,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:17,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:30:17,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:30:17,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:30:17,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:30:17,254 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-26 21:30:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:19,966 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-26 21:30:19,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:30:19,966 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-26 21:30:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:19,967 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:30:19,967 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:30:19,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:30:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:30:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-26 21:30:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-26 21:30:19,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-26 21:30:19,972 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-26 21:30:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:19,972 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-26 21:30:19,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:30:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-26 21:30:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-26 21:30:19,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:19,973 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1] [2018-09-26 21:30:19,973 INFO L423 AbstractCegarLoop]: === Iteration 66 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:19,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:19,973 INFO L82 PathProgramCache]: Analyzing trace with hash -892597023, now seen corresponding path program 65 times [2018-09-26 21:30:19,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:19,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:19,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:19,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:19,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:22,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:22,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:22,546 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:22,583 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-26 21:30:22,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:22,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:22,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:22,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-26 21:30:22,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:30:22,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:30:22,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:30:22,633 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-26 21:30:25,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:25,382 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-26 21:30:25,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:30:25,382 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-26 21:30:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:25,383 INFO L225 Difference]: With dead ends: 70 [2018-09-26 21:30:25,383 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:30:25,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:30:25,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:30:25,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:30:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:30:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-26 21:30:25,388 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-26 21:30:25,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:25,389 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-26 21:30:25,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:30:25,389 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-26 21:30:25,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:30:25,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:25,390 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1] [2018-09-26 21:30:25,390 INFO L423 AbstractCegarLoop]: === Iteration 67 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:25,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:25,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703993, now seen corresponding path program 66 times [2018-09-26 21:30:25,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:25,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:25,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:25,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:25,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:27,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:27,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:28,001 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:28,037 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-26 21:30:28,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:28,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:28,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:28,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:30:28,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:30:28,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:30:28,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:30:28,085 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-26 21:30:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:30,929 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-26 21:30:30,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:30:30,930 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-26 21:30:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:30,931 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:30:30,931 INFO L226 Difference]: Without dead ends: 70 [2018-09-26 21:30:30,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:30:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-26 21:30:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-26 21:30:30,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:30:30,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-26 21:30:30,935 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-26 21:30:30,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:30,935 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-26 21:30:30,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:30:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-26 21:30:30,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-26 21:30:30,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:30,936 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1] [2018-09-26 21:30:30,937 INFO L423 AbstractCegarLoop]: === Iteration 68 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:30,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:30,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718305, now seen corresponding path program 67 times [2018-09-26 21:30:30,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:30,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:30,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:30,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:30,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:33,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:33,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:33,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:33,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:33,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:33,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-26 21:30:33,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:30:33,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:30:33,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:30:33,578 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-26 21:30:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:36,679 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-26 21:30:36,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:30:36,680 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-26 21:30:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:36,681 INFO L225 Difference]: With dead ends: 72 [2018-09-26 21:30:36,681 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:30:36,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:30:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:30:36,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:30:36,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:30:36,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-26 21:30:36,685 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-26 21:30:36,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:36,686 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-26 21:30:36,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:30:36,686 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-26 21:30:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:30:36,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:36,686 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1] [2018-09-26 21:30:36,686 INFO L423 AbstractCegarLoop]: === Iteration 69 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:36,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:36,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438265, now seen corresponding path program 68 times [2018-09-26 21:30:36,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:36,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:36,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:36,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:36,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:39,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:39,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:39,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:39,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:39,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:39,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:39,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:39,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:30:39,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:30:39,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:30:39,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:30:39,086 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-26 21:30:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:42,233 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-26 21:30:42,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:30:42,234 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-26 21:30:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:42,234 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:30:42,235 INFO L226 Difference]: Without dead ends: 72 [2018-09-26 21:30:42,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:30:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-26 21:30:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-26 21:30:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-26 21:30:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-26 21:30:42,239 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-26 21:30:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:42,240 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-26 21:30:42,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:30:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-26 21:30:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-26 21:30:42,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:42,240 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1] [2018-09-26 21:30:42,241 INFO L423 AbstractCegarLoop]: === Iteration 70 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:42,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash 976119393, now seen corresponding path program 69 times [2018-09-26 21:30:42,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:42,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:42,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:42,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:42,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:44,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:44,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:44,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:44,731 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:30:44,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:44,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:44,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:44,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-26 21:30:44,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:30:44,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:30:44,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:30:44,778 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-26 21:30:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:48,041 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-26 21:30:48,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:30:48,042 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-26 21:30:48,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:48,043 INFO L225 Difference]: With dead ends: 74 [2018-09-26 21:30:48,043 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:30:48,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:30:48,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:30:48,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:30:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:30:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-26 21:30:48,048 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-26 21:30:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:48,048 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-26 21:30:48,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:30:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-26 21:30:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:30:48,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:48,049 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1] [2018-09-26 21:30:48,049 INFO L423 AbstractCegarLoop]: === Iteration 71 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:48,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:48,050 INFO L82 PathProgramCache]: Analyzing trace with hash 194930055, now seen corresponding path program 70 times [2018-09-26 21:30:48,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:48,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:48,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:48,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:50,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:50,419 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:50,443 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:50,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:50,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:50,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:30:50,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:30:50,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:30:50,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:30:50,482 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-26 21:30:54,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:54,765 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-26 21:30:54,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:30:54,765 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-26 21:30:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:54,766 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:30:54,766 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:30:54,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:30:54,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:30:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-26 21:30:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-26 21:30:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-26 21:30:54,771 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-26 21:30:54,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:54,772 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-26 21:30:54,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:30:54,772 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-26 21:30:54,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-26 21:30:54,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:54,773 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1] [2018-09-26 21:30:54,773 INFO L423 AbstractCegarLoop]: === Iteration 72 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:54,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864353, now seen corresponding path program 71 times [2018-09-26 21:30:54,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:54,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:54,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:54,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:57,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:30:57,531 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:57,594 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:30:57,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:57,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:57,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:57,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-26 21:30:57,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:30:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:30:57,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:30:57,658 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-26 21:31:01,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:01,081 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-26 21:31:01,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:31:01,081 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-26 21:31:01,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:01,082 INFO L225 Difference]: With dead ends: 76 [2018-09-26 21:31:01,082 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:31:01,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:31:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:31:01,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:31:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:31:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-26 21:31:01,088 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-26 21:31:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:01,088 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-26 21:31:01,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:31:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-26 21:31:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:31:01,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:01,089 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1] [2018-09-26 21:31:01,089 INFO L423 AbstractCegarLoop]: === Iteration 73 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:01,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779961, now seen corresponding path program 72 times [2018-09-26 21:31:01,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:01,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:01,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:01,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:01,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:04,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:04,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:04,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:04,485 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:31:04,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:04,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:04,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:04,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:31:04,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:31:04,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:31:04,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:31:04,579 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-26 21:31:08,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:08,151 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-26 21:31:08,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:31:08,151 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-26 21:31:08,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:08,152 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:31:08,152 INFO L226 Difference]: Without dead ends: 76 [2018-09-26 21:31:08,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:31:08,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-26 21:31:08,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-26 21:31:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-26 21:31:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-26 21:31:08,159 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-26 21:31:08,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:08,159 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-26 21:31:08,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:31:08,159 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-26 21:31:08,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-26 21:31:08,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:08,160 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1] [2018-09-26 21:31:08,160 INFO L423 AbstractCegarLoop]: === Iteration 74 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:08,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:08,160 INFO L82 PathProgramCache]: Analyzing trace with hash 365428705, now seen corresponding path program 73 times [2018-09-26 21:31:08,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:08,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:08,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:08,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:08,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:11,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:11,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:11,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:11,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:11,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:11,444 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-26 21:31:11,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:31:11,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:31:11,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:31:11,445 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-26 21:31:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:15,142 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-26 21:31:15,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:31:15,143 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-26 21:31:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:15,144 INFO L225 Difference]: With dead ends: 78 [2018-09-26 21:31:15,144 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:31:15,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:31:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:31:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:31:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:31:15,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-26 21:31:15,150 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-26 21:31:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:15,150 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-26 21:31:15,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:31:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-26 21:31:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:31:15,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:15,151 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1] [2018-09-26 21:31:15,151 INFO L423 AbstractCegarLoop]: === Iteration 75 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:15,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:15,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1556612089, now seen corresponding path program 74 times [2018-09-26 21:31:15,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:15,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:15,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:15,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:15,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:19,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:19,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:19,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:19,054 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:19,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:19,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:19,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:19,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:31:19,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:31:19,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:31:19,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:31:19,099 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-26 21:31:22,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:22,781 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-26 21:31:22,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:31:22,782 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-26 21:31:22,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:22,783 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:31:22,783 INFO L226 Difference]: Without dead ends: 78 [2018-09-26 21:31:22,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:31:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-26 21:31:22,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-26 21:31:22,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-26 21:31:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-26 21:31:22,788 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-26 21:31:22,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:22,788 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-26 21:31:22,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:31:22,788 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-26 21:31:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-26 21:31:22,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:22,789 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1] [2018-09-26 21:31:22,789 INFO L423 AbstractCegarLoop]: === Iteration 76 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:22,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:22,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334559, now seen corresponding path program 75 times [2018-09-26 21:31:22,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:22,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:22,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:22,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:22,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:25,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:25,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:25,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:25,681 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-26 21:31:25,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:25,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:25,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:25,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-26 21:31:25,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:31:25,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:31:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:31:25,728 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-26 21:31:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:29,545 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-26 21:31:29,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:31:29,546 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-26 21:31:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:29,546 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:31:29,546 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:31:29,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:31:29,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:31:29,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:31:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:31:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-26 21:31:29,551 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-26 21:31:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:29,551 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-26 21:31:29,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:31:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-26 21:31:29,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:31:29,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:29,552 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1] [2018-09-26 21:31:29,552 INFO L423 AbstractCegarLoop]: === Iteration 77 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:29,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:29,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600313, now seen corresponding path program 76 times [2018-09-26 21:31:29,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:29,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:29,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:29,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:29,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:33,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:33,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:33,453 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:33,477 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:33,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:33,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:33,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:33,518 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:31:33,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:31:33,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:31:33,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:31:33,519 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-26 21:31:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:37,248 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-26 21:31:37,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:31:37,248 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-26 21:31:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:37,249 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:31:37,249 INFO L226 Difference]: Without dead ends: 80 [2018-09-26 21:31:37,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:31:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-26 21:31:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-26 21:31:37,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:31:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-26 21:31:37,253 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-26 21:31:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:37,253 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-26 21:31:37,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:31:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-26 21:31:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-26 21:31:37,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:37,253 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1] [2018-09-26 21:31:37,254 INFO L423 AbstractCegarLoop]: === Iteration 78 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:37,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:37,254 INFO L82 PathProgramCache]: Analyzing trace with hash -268904095, now seen corresponding path program 77 times [2018-09-26 21:31:37,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:37,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:37,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:37,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:40,560 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:40,568 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:40,608 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-26 21:31:40,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:40,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:40,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-26 21:31:40,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:31:40,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:31:40,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:31:40,712 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-26 21:31:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:44,745 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-26 21:31:44,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:31:44,746 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-26 21:31:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:44,746 INFO L225 Difference]: With dead ends: 82 [2018-09-26 21:31:44,747 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:31:44,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:31:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:31:44,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:31:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:31:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-26 21:31:44,753 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-26 21:31:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:44,753 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-26 21:31:44,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:31:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-26 21:31:44,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:31:44,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:44,754 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1] [2018-09-26 21:31:44,754 INFO L423 AbstractCegarLoop]: === Iteration 79 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:44,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:44,755 INFO L82 PathProgramCache]: Analyzing trace with hash 253907591, now seen corresponding path program 78 times [2018-09-26 21:31:44,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:44,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:44,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:44,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:44,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:47,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:47,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:47,903 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:48,025 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-26 21:31:48,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:48,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:48,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:48,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:31:48,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:31:48,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:31:48,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:31:48,070 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-26 21:31:52,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:52,093 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-26 21:31:52,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:31:52,094 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-26 21:31:52,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:52,094 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:31:52,095 INFO L226 Difference]: Without dead ends: 82 [2018-09-26 21:31:52,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:31:52,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-26 21:31:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-26 21:31:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-26 21:31:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-26 21:31:52,099 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-26 21:31:52,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:52,099 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-26 21:31:52,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:31:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-26 21:31:52,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-26 21:31:52,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:52,100 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1] [2018-09-26 21:31:52,100 INFO L423 AbstractCegarLoop]: === Iteration 80 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:52,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:52,100 INFO L82 PathProgramCache]: Analyzing trace with hash -718799327, now seen corresponding path program 79 times [2018-09-26 21:31:52,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:52,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:52,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:52,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:52,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:56,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:56,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:31:56,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:56,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:56,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:56,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-26 21:31:56,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:31:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:31:56,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:31:56,224 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-26 21:32:00,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:00,397 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-26 21:32:00,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:32:00,398 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-26 21:32:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:00,398 INFO L225 Difference]: With dead ends: 84 [2018-09-26 21:32:00,399 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:32:00,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:32:00,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:32:00,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:32:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:32:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-26 21:32:00,403 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-26 21:32:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:00,404 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-26 21:32:00,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:32:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-26 21:32:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:32:00,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:00,404 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1] [2018-09-26 21:32:00,404 INFO L423 AbstractCegarLoop]: === Iteration 81 === [procErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:00,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:00,405 INFO L82 PathProgramCache]: Analyzing trace with hash -807942713, now seen corresponding path program 80 times [2018-09-26 21:32:00,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:00,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:00,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:00,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:00,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:03,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:03,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:32:03,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:03,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:03,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:03,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:03,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:03,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-26 21:32:03,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:32:03,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:32:03,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:32:03,777 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. Received shutdown request... [2018-09-26 21:32:07,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:32:07,179 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:32:07,184 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:32:07,184 INFO L202 PluginConnector]: Adding new model DivisibilityInterpolantRequired01-BackwardSuccess.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:32:07 BoogieIcfgContainer [2018-09-26 21:32:07,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:32:07,185 INFO L168 Benchmark]: Toolchain (without parser) took 243196.58 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -104.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 359.5 MB). Peak memory consumption was 255.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:32:07,187 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:32:07,187 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:32:07,187 INFO L168 Benchmark]: Boogie Preprocessor took 20.58 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:32:07,188 INFO L168 Benchmark]: RCFGBuilder took 262.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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. [2018-09-26 21:32:07,188 INFO L168 Benchmark]: TraceAbstraction took 242865.76 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -104.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 338.3 MB). Peak memory consumption was 234.0 MB. Max. memory is 7.1 GB. [2018-09-26 21:32:07,190 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 0.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.58 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 262.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 242865.76 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -104.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 338.3 MB). Peak memory consumption was 234.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 21). Cancelled while BasicCegarLoop was constructing difference of abstraction (83states) and FLOYD_HOARE automaton (currently 72 states, 83 states before enhancement), while ReachableStatesComputation was computing reachable states (70 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 242.7s OverallTime, 81 OverallIterations, 80 TraceHistogramMax, 123.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 162 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 186031 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 102.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6641 GetRequests, 3240 SyntacticMatches, 80 SemanticMatches, 3321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 80 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 113.1s InterpolantComputationTime, 6802 NumberOfCodeBlocks, 6802 NumberOfCodeBlocksAsserted, 981 NumberOfCheckSat, 6641 ConstructedInterpolants, 0 QuantifiedInterpolants, 2526167 SizeOfPredicates, 0 NumberOfNonLiveVariables, 6880 ConjunctsInSsa, 6720 ConjunctsInUnsatCore, 161 InterpolantComputations, 1 PerfectInterpolantSequences, 0/177120 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/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-32-07-200.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/DivisibilityInterpolantRequired01-BackwardSuccess.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-32-07-200.csv Completed graceful shutdown