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/HierarchicalTraceAbstraction/GeometricalCake.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:28:13,122 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:28:13,124 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:28:13,141 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:28:13,142 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:28:13,144 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:28:13,145 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:28:13,147 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:28:13,150 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:28:13,151 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:28:13,154 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:28:13,154 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:28:13,155 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:28:13,156 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:28:13,157 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:28:13,158 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:28:13,159 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:28:13,161 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:28:13,162 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:28:13,164 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:28:13,165 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:28:13,166 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:28:13,169 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 20:28:13,184 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:28:13,213 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:28:13,214 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:28:13,215 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:28:13,215 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:28:13,216 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:28:13,216 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:28:13,216 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:28:13,217 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:28:13,217 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:28:13,217 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:28:13,217 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:28:13,217 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:28:13,217 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:28:13,218 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:28:13,218 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:28:13,218 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:28:13,218 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:28:13,220 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:28:13,220 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:28:13,220 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:28:13,220 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:28:13,221 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:28:13,221 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:28:13,221 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:28:13,221 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:28:13,221 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:28:13,222 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:28:13,222 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:28:13,222 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:28:13,222 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:28:13,291 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:28:13,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:28:13,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:28:13,314 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:28:13,315 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:28:13,315 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl [2018-09-30 20:28:13,316 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl' [2018-09-30 20:28:13,368 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:28:13,374 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:28:13,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:28:13,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:28:13,375 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:28:13,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:13" (1/1) ... [2018-09-30 20:28:13,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:13" (1/1) ... [2018-09-30 20:28:13,415 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 20:28:13,416 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 20:28:13,416 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 20:28:13,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:28:13,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:28:13,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:28:13,419 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:28:13,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:13" (1/1) ... [2018-09-30 20:28:13,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:13" (1/1) ... [2018-09-30 20:28:13,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:13" (1/1) ... [2018-09-30 20:28:13,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:13" (1/1) ... [2018-09-30 20:28:13,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:13" (1/1) ... [2018-09-30 20:28:13,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:13" (1/1) ... [2018-09-30 20:28:13,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:13" (1/1) ... [2018-09-30 20:28:13,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:28:13,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:28:13,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:28:13,443 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:28:13,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:28:13,517 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 20:28:13,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 20:28:13,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 20:28:13,715 INFO L345 CfgBuilder]: Using library mode [2018-09-30 20:28:13,716 INFO L202 PluginConnector]: Adding new model GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:28:13 BoogieIcfgContainer [2018-09-30 20:28:13,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:28:13,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:28:13,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:28:13,721 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:28:13,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:28:13" (1/2) ... [2018-09-30 20:28:13,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252499b8 and model type GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:28:13, skipping insertion in model container [2018-09-30 20:28:13,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:28:13" (2/2) ... [2018-09-30 20:28:13,729 INFO L112 eAbstractionObserver]: Analyzing ICFG GeometricalCake.bpl [2018-09-30 20:28:13,742 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:28:13,754 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:28:13,809 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:28:13,810 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:28:13,811 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:28:13,811 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:28:13,811 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:28:13,811 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:28:13,811 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:28:13,812 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:28:13,812 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:28:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-30 20:28:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-09-30 20:28:13,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:13,844 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-09-30 20:28:13,845 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:13,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:13,852 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-09-30 20:28:13,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:13,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:13,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:13,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:13,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,026 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:28:14,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-09-30 20:28:14,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:28:14,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:28:14,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:28:14,047 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-30 20:28:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:14,090 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:28:14,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:28:14,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-09-30 20:28:14,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:14,103 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:28:14,103 INFO L226 Difference]: Without dead ends: 4 [2018-09-30 20:28:14,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:28:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-09-30 20:28:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-09-30 20:28:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-09-30 20:28:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-09-30 20:28:14,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-09-30 20:28:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:14,144 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-09-30 20:28:14,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:28:14,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-09-30 20:28:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:28:14,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:14,145 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:28:14,146 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:14,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-09-30 20:28:14,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:14,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:14,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:14,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:14,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:14,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:14,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:14,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2018-09-30 20:28:14,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:28:14,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:28:14,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:28:14,465 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 5 states. [2018-09-30 20:28:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:14,509 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-09-30 20:28:14,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:28:14,511 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 3 [2018-09-30 20:28:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:14,511 INFO L225 Difference]: With dead ends: 6 [2018-09-30 20:28:14,512 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 20:28:14,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:28:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 20:28:14,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 20:28:14,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 20:28:14,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 20:28:14,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 20:28:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:14,518 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 20:28:14,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:28:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 20:28:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:28:14,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:14,519 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-09-30 20:28:14,520 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:14,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:14,520 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-09-30 20:28:14,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:14,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:14,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:14,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:14,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:14,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:14,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:14,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:14,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:14,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:14,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2018-09-30 20:28:14,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:28:14,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:28:14,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:28:14,771 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 7 states. [2018-09-30 20:28:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:14,809 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-09-30 20:28:14,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:28:14,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 4 [2018-09-30 20:28:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:14,810 INFO L225 Difference]: With dead ends: 7 [2018-09-30 20:28:14,810 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 20:28:14,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:28:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 20:28:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 20:28:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:28:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 20:28:14,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 20:28:14,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:14,814 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 20:28:14,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:28:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 20:28:14,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:28:14,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:14,815 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-09-30 20:28:14,816 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:14,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:14,816 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-09-30 20:28:14,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:14,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:14,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:14,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:15,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:15,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:15,069 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 20:28:15,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:15,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:15,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-09-30 20:28:15,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:28:15,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:28:15,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:28:15,327 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 9 states. [2018-09-30 20:28:15,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:15,366 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 20:28:15,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:28:15,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2018-09-30 20:28:15,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:15,368 INFO L225 Difference]: With dead ends: 8 [2018-09-30 20:28:15,368 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:28:15,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:28:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:28:15,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:28:15,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:28:15,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:28:15,374 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 20:28:15,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:15,374 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:28:15,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:28:15,375 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:28:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:28:15,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:15,375 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-09-30 20:28:15,375 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:15,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:15,376 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-09-30 20:28:15,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:15,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:15,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:15,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:15,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:15,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:15,489 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:15,505 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:15,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:15,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:15,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:15,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-09-30 20:28:15,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:28:15,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:28:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:15,750 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 11 states. [2018-09-30 20:28:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:15,851 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:28:15,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:28:15,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-09-30 20:28:15,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:15,852 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:28:15,852 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:28:15,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:28:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:28:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:28:15,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:28:15,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 20:28:15,856 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 20:28:15,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:15,857 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 20:28:15,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:28:15,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 20:28:15,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:28:15,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:15,858 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-09-30 20:28:15,858 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:15,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:15,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-09-30 20:28:15,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:15,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:15,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:15,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:15,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:16,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:16,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:16,029 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:16,059 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 20:28:16,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:16,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:16,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:16,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-30 20:28:16,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:28:16,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:28:16,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:28:16,608 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 13 states. [2018-09-30 20:28:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:16,707 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 20:28:16,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:28:16,709 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-09-30 20:28:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:16,710 INFO L225 Difference]: With dead ends: 10 [2018-09-30 20:28:16,710 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:28:16,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:28:16,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:28:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:28:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:28:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:28:16,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 20:28:16,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:16,715 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:28:16,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:28:16,715 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:28:16,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:28:16,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:16,716 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-09-30 20:28:16,716 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:16,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:16,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-09-30 20:28:16,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:16,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:16,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:16,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:16,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:16,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:16,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:16,887 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:16,900 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 20:28:16,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:16,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:17,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:17,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 20:28:17,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:28:17,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:28:17,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:28:17,315 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 15 states. [2018-09-30 20:28:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:17,414 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:28:17,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:28:17,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 8 [2018-09-30 20:28:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:17,415 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:28:17,415 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:28:17,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:28:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:28:17,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:28:17,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:28:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 20:28:17,420 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 20:28:17,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:17,421 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 20:28:17,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:28:17,421 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 20:28:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:28:17,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:17,422 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-09-30 20:28:17,422 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:17,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:17,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-09-30 20:28:17,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:17,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:17,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:17,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:17,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:17,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:17,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:17,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:17,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:18,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:18,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-30 20:28:18,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:28:18,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:28:18,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:28:18,078 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 17 states. [2018-09-30 20:28:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:18,265 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 20:28:18,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:28:18,265 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 9 [2018-09-30 20:28:18,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:18,266 INFO L225 Difference]: With dead ends: 12 [2018-09-30 20:28:18,266 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:28:18,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:28:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:28:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:28:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:28:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:28:18,270 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 20:28:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:18,270 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:28:18,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:28:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:28:18,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:28:18,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:18,271 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-09-30 20:28:18,271 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:18,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:18,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-09-30 20:28:18,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:18,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:18,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:18,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:18,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:18,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:18,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:18,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:18,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:18,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:18,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:18,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:18,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-30 20:28:18,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:28:18,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:28:18,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:28:18,995 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 19 states. [2018-09-30 20:28:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:19,134 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:28:19,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:28:19,135 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 10 [2018-09-30 20:28:19,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:19,136 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:28:19,137 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:28:19,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:28:19,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:28:19,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 20:28:19,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:28:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 20:28:19,142 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 20:28:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:19,142 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 20:28:19,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:28:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 20:28:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:28:19,143 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:19,143 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-09-30 20:28:19,143 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:19,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:19,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-09-30 20:28:19,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:19,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:19,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:19,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:19,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:19,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:19,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:19,463 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:19,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:28:19,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:19,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:19,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:19,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-30 20:28:19,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:28:19,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:28:19,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:28:19,886 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 21 states. [2018-09-30 20:28:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:20,088 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 20:28:20,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:28:20,088 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 11 [2018-09-30 20:28:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:20,089 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:28:20,089 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:28:20,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:28:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:28:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:28:20,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:28:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:28:20,093 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 20:28:20,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:20,093 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:28:20,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:28:20,093 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:28:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:28:20,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:20,094 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-09-30 20:28:20,094 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:20,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:20,095 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-09-30 20:28:20,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:20,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:20,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:20,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:20,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:20,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:20,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:20,388 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:20,399 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:20,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:20,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:20,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:20,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-30 20:28:20,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:28:20,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:28:20,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:28:20,823 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 23 states. [2018-09-30 20:28:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:21,323 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:28:21,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:28:21,325 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 12 [2018-09-30 20:28:21,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:21,326 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:28:21,327 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:28:21,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:28:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:28:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:28:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:28:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 20:28:21,331 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 20:28:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:21,332 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 20:28:21,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:28:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 20:28:21,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:28:21,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:21,332 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-09-30 20:28:21,333 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:21,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:21,333 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-09-30 20:28:21,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:21,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:21,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:21,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:21,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:21,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:21,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:21,860 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:21,874 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:28:21,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:21,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:22,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:22,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-09-30 20:28:22,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:28:22,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:28:22,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:28:22,573 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 25 states. [2018-09-30 20:28:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:23,069 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 20:28:23,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:28:23,069 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 13 [2018-09-30 20:28:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:23,070 INFO L225 Difference]: With dead ends: 16 [2018-09-30 20:28:23,070 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:28:23,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:28:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:28:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:28:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:28:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:28:23,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 20:28:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:23,076 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:28:23,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:28:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:28:23,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:28:23,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:23,077 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-09-30 20:28:23,077 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:23,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:23,078 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-09-30 20:28:23,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:23,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:23,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:23,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:23,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:23,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:23,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:23,521 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:23,536 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:28:23,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:23,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:24,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:24,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-09-30 20:28:24,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:28:24,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:28:24,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:28:24,032 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 27 states. [2018-09-30 20:28:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:24,361 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:28:24,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:28:24,361 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 14 [2018-09-30 20:28:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:24,362 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:28:24,362 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:28:24,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:28:24,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:28:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:28:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:28:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 20:28:24,368 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 20:28:24,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:24,368 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 20:28:24,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:28:24,368 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 20:28:24,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:28:24,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:24,369 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-09-30 20:28:24,369 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:24,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:24,369 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-09-30 20:28:24,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:24,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:24,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:24,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:24,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:25,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:25,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:25,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:25,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:25,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:25,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-09-30 20:28:25,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:28:25,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:28:25,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:28:25,769 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 29 states. [2018-09-30 20:28:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:26,158 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 20:28:26,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:28:26,158 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 15 [2018-09-30 20:28:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:26,159 INFO L225 Difference]: With dead ends: 18 [2018-09-30 20:28:26,159 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:28:26,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:28:26,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:28:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:28:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:28:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:28:26,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 20:28:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:26,165 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:28:26,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:28:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:28:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:28:26,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:26,166 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-09-30 20:28:26,166 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:26,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:26,166 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-09-30 20:28:26,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:26,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:26,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:26,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:26,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:26,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:26,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:26,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:26,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:26,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:26,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:27,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:27,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-09-30 20:28:27,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:28:27,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:28:27,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:28:27,642 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 31 states. [2018-09-30 20:28:28,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:28,017 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:28:28,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:28:28,018 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 16 [2018-09-30 20:28:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:28,019 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:28:28,019 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:28:28,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:28:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:28:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 20:28:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:28:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 20:28:28,024 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 20:28:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:28,025 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 20:28:28,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:28:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 20:28:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:28:28,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:28,026 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-09-30 20:28:28,026 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:28,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:28,026 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-09-30 20:28:28,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:28,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:28,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:28,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:28,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:28,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:28,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:28,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:28,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:28:28,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:28,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:29,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:29,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-09-30 20:28:29,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:28:29,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:28:29,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:28:29,931 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 33 states. [2018-09-30 20:28:30,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:30,460 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 20:28:30,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:28:30,460 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 17 [2018-09-30 20:28:30,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:30,461 INFO L225 Difference]: With dead ends: 20 [2018-09-30 20:28:30,461 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:28:30,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:28:30,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:28:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:28:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:28:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:28:30,468 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 20:28:30,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:30,468 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:28:30,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:28:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:28:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:28:30,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:30,469 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-09-30 20:28:30,469 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:30,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:30,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-09-30 20:28:30,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:30,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:30,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:30,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:30,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:30,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:30,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:30,977 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:30,994 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:30,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:30,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:31,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:31,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-09-30 20:28:31,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:28:31,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:28:31,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:28:31,840 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 35 states. [2018-09-30 20:28:32,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:32,468 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:28:32,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:28:32,468 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 18 [2018-09-30 20:28:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:32,469 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:28:32,469 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:28:32,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:28:32,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:28:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:28:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:28:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 20:28:32,474 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 20:28:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:32,474 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 20:28:32,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:28:32,475 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 20:28:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:28:32,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:32,475 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-09-30 20:28:32,475 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:32,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:32,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-09-30 20:28:32,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:32,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:32,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:32,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:32,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:32,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:32,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:32,990 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:33,054 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 20:28:33,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:33,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:34,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:34,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-09-30 20:28:34,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:28:34,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:28:34,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:28:34,133 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 37 states. [2018-09-30 20:28:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:34,789 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 20:28:34,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:28:34,789 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 19 [2018-09-30 20:28:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:34,790 INFO L225 Difference]: With dead ends: 22 [2018-09-30 20:28:34,790 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:28:34,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:28:34,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:28:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:28:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:28:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:28:34,796 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 20:28:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:34,796 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:28:34,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:28:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:28:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:28:34,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:34,797 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-09-30 20:28:34,798 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:34,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:34,798 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-09-30 20:28:34,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:34,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:34,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:34,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:34,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:34,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:35,374 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:35,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:35,384 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:35,404 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 20:28:35,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:35,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:36,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:36,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-09-30 20:28:36,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:28:36,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:28:36,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:28:36,610 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 39 states. [2018-09-30 20:28:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:37,371 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:28:37,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:28:37,371 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 20 [2018-09-30 20:28:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:37,372 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:28:37,372 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:28:37,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:28:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:28:37,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:28:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:28:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 20:28:37,378 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 20:28:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:37,379 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 20:28:37,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:28:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 20:28:37,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:28:37,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:37,379 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-09-30 20:28:37,380 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:37,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:37,380 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-09-30 20:28:37,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:37,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:37,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:37,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:37,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:38,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:38,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:38,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:38,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:39,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:39,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-09-30 20:28:39,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:28:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:28:39,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:28:39,559 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 41 states. [2018-09-30 20:28:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:40,469 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 20:28:40,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:28:40,470 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 21 [2018-09-30 20:28:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:40,470 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:28:40,471 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:28:40,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:28:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:28:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:28:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:28:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:28:40,479 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 20:28:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:40,480 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:28:40,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:28:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:28:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:28:40,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:40,481 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-09-30 20:28:40,481 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:40,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:40,482 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-09-30 20:28:40,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:40,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:40,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:40,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:28:40,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:41,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:41,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:41,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:28:41,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:28:41,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:41,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:42,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:42,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-09-30 20:28:42,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:28:42,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:28:42,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:28:42,897 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 43 states. [2018-09-30 20:28:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:43,845 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:28:43,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:28:43,846 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 22 [2018-09-30 20:28:43,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:43,846 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:28:43,847 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:28:43,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:28:43,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:28:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 20:28:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:28:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 20:28:43,851 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 20:28:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:43,851 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 20:28:43,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:28:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 20:28:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:28:43,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:43,852 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-09-30 20:28:43,853 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:43,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:43,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-09-30 20:28:43,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:43,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:43,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:43,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:43,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:44,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:44,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:44,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:28:44,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 20:28:44,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:44,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:46,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:46,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-09-30 20:28:46,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:28:46,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:28:46,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:28:46,881 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 45 states. [2018-09-30 20:28:47,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:47,745 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 20:28:47,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:28:47,748 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 23 [2018-09-30 20:28:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:47,748 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:28:47,748 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:28:47,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:28:47,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:28:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:28:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:28:47,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:28:47,753 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 20:28:47,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:47,754 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:28:47,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:28:47,754 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:28:47,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:28:47,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:47,755 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-09-30 20:28:47,755 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:47,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-09-30 20:28:47,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:47,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:47,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:47,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:47,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:49,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:49,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:49,454 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:28:49,478 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:28:49,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:49,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:51,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:51,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-09-30 20:28:51,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:28:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:28:51,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:28:51,150 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 47 states. [2018-09-30 20:28:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:52,257 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:28:52,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:28:52,257 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 24 [2018-09-30 20:28:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:52,258 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:28:52,258 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:28:52,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:28:52,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:28:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:28:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:28:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 20:28:52,265 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 20:28:52,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:52,265 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 20:28:52,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:28:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 20:28:52,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:28:52,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:52,266 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-09-30 20:28:52,266 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:52,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:52,267 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-09-30 20:28:52,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:52,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:52,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:52,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:52,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:53,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:53,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:53,162 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:28:53,195 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 20:28:53,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:53,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:28:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:55,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:28:55,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-09-30 20:28:55,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:28:55,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:28:55,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:28:55,205 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 49 states. [2018-09-30 20:28:56,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:28:56,816 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 20:28:56,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:28:56,817 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 25 [2018-09-30 20:28:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:28:56,818 INFO L225 Difference]: With dead ends: 28 [2018-09-30 20:28:56,818 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:28:56,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:28:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:28:56,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:28:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:28:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:28:56,823 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 20:28:56,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:28:56,823 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:28:56,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:28:56,824 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:28:56,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:28:56,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:28:56,824 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-09-30 20:28:56,825 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:28:56,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:28:56,825 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-09-30 20:28:56,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:28:56,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:28:56,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:56,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:28:56,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:28:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:28:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:28:58,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:28:58,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:28:58,022 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:28:58,062 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:28:58,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:28:58,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:00,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:00,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-09-30 20:29:00,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:29:00,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:29:00,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2127, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:29:00,268 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 51 states. [2018-09-30 20:29:01,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:01,503 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:29:01,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:29:01,504 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 26 [2018-09-30 20:29:01,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:01,504 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:29:01,505 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:29:01,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=423, Invalid=2127, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:29:01,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:29:01,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:29:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:29:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 20:29:01,511 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 20:29:01,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:01,512 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 20:29:01,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:29:01,512 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 20:29:01,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:29:01,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:01,513 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-09-30 20:29:01,513 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:01,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:01,513 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-09-30 20:29:01,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:01,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:01,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:01,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:01,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:02,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:02,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:29:02,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:02,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:05,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:05,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-09-30 20:29:05,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:29:05,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:29:05,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2303, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:29:05,484 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 53 states. [2018-09-30 20:29:06,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:06,807 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 20:29:06,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:29:06,808 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 27 [2018-09-30 20:29:06,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:06,809 INFO L225 Difference]: With dead ends: 30 [2018-09-30 20:29:06,809 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:29:06,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=453, Invalid=2303, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:29:06,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:29:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:29:06,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:29:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:29:06,815 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 20:29:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:06,815 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:29:06,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:29:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:29:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:29:06,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:06,816 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-09-30 20:29:06,816 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:06,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-09-30 20:29:06,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:06,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:06,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:06,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:06,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:08,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:08,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:29:08,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:29:08,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:29:08,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:08,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:10,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:10,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-09-30 20:29:10,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:29:10,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:29:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:29:10,796 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 55 states. [2018-09-30 20:29:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:12,835 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:29:12,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:29:12,836 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 28 [2018-09-30 20:29:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:12,837 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:29:12,837 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:29:12,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:29:12,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:29:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 20:29:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:29:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 20:29:12,843 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 20:29:12,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:12,843 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 20:29:12,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:29:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 20:29:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:29:12,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:12,844 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-09-30 20:29:12,844 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:12,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-09-30 20:29:12,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:12,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:12,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:12,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:12,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:14,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:14,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:29:14,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:29:14,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 20:29:14,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:14,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:17,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:17,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-09-30 20:29:17,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:29:17,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:29:17,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:29:17,709 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 57 states. [2018-09-30 20:29:20,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:20,025 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 20:29:20,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:29:20,025 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 29 [2018-09-30 20:29:20,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:20,026 INFO L225 Difference]: With dead ends: 32 [2018-09-30 20:29:20,026 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:29:20,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:29:20,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:29:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:29:20,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:29:20,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:29:20,033 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 20:29:20,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:20,034 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:29:20,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:29:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:29:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:29:20,034 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:20,035 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-09-30 20:29:20,035 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:20,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:20,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-09-30 20:29:20,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:20,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:20,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:20,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:20,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:21,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:21,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:29:21,489 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:29:21,525 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:29:21,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:21,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:24,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:24,630 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-09-30 20:29:24,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:29:24,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:29:24,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=2873, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:29:24,632 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 59 states. [2018-09-30 20:29:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:26,825 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:29:26,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:29:26,826 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 30 [2018-09-30 20:29:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:26,827 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:29:26,827 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:29:26,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=549, Invalid=2873, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:29:26,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:29:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:29:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:29:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 20:29:26,836 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 20:29:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:26,836 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 20:29:26,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:29:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 20:29:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:29:26,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:26,837 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-09-30 20:29:26,838 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:26,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:26,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-09-30 20:29:26,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:26,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:26,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:26,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:26,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:28,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:28,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:29:28,545 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:29:28,598 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 20:29:28,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:28,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:32,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:32,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-09-30 20:29:32,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:29:32,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:29:32,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:29:32,018 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 61 states. [2018-09-30 20:29:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:33,932 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 20:29:33,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:29:33,933 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 31 [2018-09-30 20:29:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:33,934 INFO L225 Difference]: With dead ends: 34 [2018-09-30 20:29:33,934 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:29:33,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:29:33,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:29:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:29:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:29:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:29:33,940 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 20:29:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:33,941 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:29:33,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:29:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:29:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:29:33,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:33,941 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-09-30 20:29:33,942 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:33,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:33,942 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-09-30 20:29:33,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:33,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:33,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:33,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:33,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:35,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:35,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:29:35,828 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:29:35,947 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 20:29:35,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:35,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:39,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:39,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-09-30 20:29:39,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:29:39,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:29:39,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:29:39,578 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 63 states. [2018-09-30 20:29:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:41,926 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:29:41,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:29:41,927 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 32 [2018-09-30 20:29:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:41,927 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:29:41,928 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:29:41,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:29:41,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:29:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:29:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:29:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 20:29:41,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 20:29:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:41,934 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 20:29:41,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:29:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 20:29:41,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:29:41,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:41,934 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-09-30 20:29:41,934 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:41,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-09-30 20:29:41,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:41,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:41,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:41,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:29:41,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:43,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:43,833 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:29:43,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:43,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:48,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:48,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-09-30 20:29:48,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:29:48,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:29:48,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=3506, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:29:48,186 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 65 states. [2018-09-30 20:29:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:29:51,196 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 20:29:51,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:29:51,196 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 33 [2018-09-30 20:29:51,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:29:51,197 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:29:51,197 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:29:51,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=654, Invalid=3506, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:29:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:29:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:29:51,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:29:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:29:51,202 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 20:29:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:29:51,202 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:29:51,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:29:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:29:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:29:51,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:29:51,203 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-09-30 20:29:51,203 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:29:51,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:29:51,204 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-09-30 20:29:51,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:29:51,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:29:51,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:51,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:29:51,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:29:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:29:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:53,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:29:53,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:29:53,216 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:29:53,260 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:29:53,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:29:53,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:29:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:29:57,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:29:57,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-09-30 20:29:57,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:29:57,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:29:57,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:29:57,582 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 67 states. [2018-09-30 20:30:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:01,071 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:30:01,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:30:01,072 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 34 [2018-09-30 20:30:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:01,073 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:30:01,073 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:30:01,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:30:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:30:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:30:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:30:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 20:30:01,079 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 20:30:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:01,079 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 20:30:01,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:30:01,079 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 20:30:01,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:30:01,080 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:01,080 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-09-30 20:30:01,080 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:01,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-09-30 20:30:01,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:01,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:01,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:01,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:01,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:03,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:03,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:30:03,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:30:03,329 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 20:30:03,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:03,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:07,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:07,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-09-30 20:30:07,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:30:07,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:30:07,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=3963, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:30:07,998 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 69 states. [2018-09-30 20:30:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:11,103 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 20:30:11,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:30:11,104 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 35 [2018-09-30 20:30:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:11,104 INFO L225 Difference]: With dead ends: 38 [2018-09-30 20:30:11,105 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:30:11,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=729, Invalid=3963, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:30:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:30:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:30:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:30:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 20:30:11,111 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 20:30:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:11,111 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 20:30:11,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:30:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 20:30:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:30:11,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:11,112 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-09-30 20:30:11,112 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:11,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:11,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-09-30 20:30:11,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:11,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:11,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:11,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:11,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:13,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:13,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:30:13,443 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:30:13,495 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:30:13,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:13,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:18,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:18,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-09-30 20:30:18,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:30:18,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:30:18,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:30:18,614 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 71 states. [2018-09-30 20:30:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:22,617 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:30:22,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:30:22,618 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 36 [2018-09-30 20:30:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:22,618 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:30:22,619 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:30:22,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:30:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:30:22,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 20:30:22,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:30:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 20:30:22,624 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 20:30:22,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:22,624 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 20:30:22,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:30:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 20:30:22,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:30:22,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:22,624 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-09-30 20:30:22,624 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:22,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:22,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-09-30 20:30:22,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:22,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:22,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:22,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:22,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:25,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:25,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:30:25,205 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:30:25,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 20:30:25,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:25,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:30,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:30,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-09-30 20:30:30,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:30:30,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:30:30,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=4448, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 20:30:30,897 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 73 states. [2018-09-30 20:30:34,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:34,590 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 20:30:34,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:30:34,591 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 37 [2018-09-30 20:30:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:34,591 INFO L225 Difference]: With dead ends: 40 [2018-09-30 20:30:34,591 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:30:34,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=808, Invalid=4448, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 20:30:34,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:30:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:30:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:30:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:30:34,598 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 20:30:34,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:34,598 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:30:34,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:30:34,598 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:30:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:30:34,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:34,615 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-09-30 20:30:34,615 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:34,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-09-30 20:30:34,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:34,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:34,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:34,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:34,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:37,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:37,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:30:37,495 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:30:37,559 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:30:37,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:30:37,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:43,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:43,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-09-30 20:30:43,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:30:43,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:30:43,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=4701, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:30:43,583 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 75 states. [2018-09-30 20:30:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:30:48,365 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:30:48,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:30:48,365 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 38 [2018-09-30 20:30:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:30:48,366 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:30:48,366 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:30:48,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=849, Invalid=4701, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:30:48,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:30:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:30:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:30:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 20:30:48,371 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 20:30:48,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:30:48,371 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 20:30:48,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:30:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 20:30:48,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:30:48,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:30:48,372 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-09-30 20:30:48,372 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:30:48,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:30:48,373 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-09-30 20:30:48,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:30:48,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:30:48,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:48,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:30:48,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:30:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:51,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:30:51,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:30:51,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:30:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:30:51,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:30:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:30:57,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:30:57,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-09-30 20:30:57,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:30:57,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:30:57,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=4961, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:30:57,943 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 77 states. [2018-09-30 20:31:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:02,705 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 20:31:02,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:31:02,705 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 39 [2018-09-30 20:31:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:02,706 INFO L225 Difference]: With dead ends: 42 [2018-09-30 20:31:02,706 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:31:02,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=891, Invalid=4961, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:31:02,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:31:02,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:31:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:31:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 20:31:02,710 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 20:31:02,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:02,711 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 20:31:02,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:31:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 20:31:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:31:02,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:02,711 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-09-30 20:31:02,711 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:02,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:02,712 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-09-30 20:31:02,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:02,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:02,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:02,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:31:02,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:05,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:05,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:31:05,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:31:05,977 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:31:05,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:05,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:12,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:12,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-09-30 20:31:12,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 20:31:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 20:31:12,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=934, Invalid=5228, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 20:31:12,998 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 79 states. [2018-09-30 20:31:17,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:17,728 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:31:17,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:31:17,728 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 40 [2018-09-30 20:31:17,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:17,729 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:31:17,729 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:31:17,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=934, Invalid=5228, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 20:31:17,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:31:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 20:31:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:31:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 20:31:17,734 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 20:31:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:17,734 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 20:31:17,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 20:31:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 20:31:17,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:31:17,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:17,735 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-09-30 20:31:17,735 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:17,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:17,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-09-30 20:31:17,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:17,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:17,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:17,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:17,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:21,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:21,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:31:21,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:31:21,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 20:31:21,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:21,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:28,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:28,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2018-09-30 20:31:28,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 20:31:28,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 20:31:28,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=978, Invalid=5502, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 20:31:28,745 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 81 states. [2018-09-30 20:31:33,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:33,344 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 20:31:33,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:31:33,345 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 41 [2018-09-30 20:31:33,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:33,345 INFO L225 Difference]: With dead ends: 44 [2018-09-30 20:31:33,345 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:31:33,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=978, Invalid=5502, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 20:31:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:31:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:31:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:31:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:31:33,350 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 20:31:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:33,350 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:31:33,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 20:31:33,350 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:31:33,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:31:33,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:33,351 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-09-30 20:31:33,351 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:33,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:33,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-09-30 20:31:33,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:33,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:33,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:33,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:33,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:37,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:37,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:31:37,081 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:31:37,151 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:31:37,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:37,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:31:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:45,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:31:45,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-09-30 20:31:45,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:31:45,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:31:45,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=5783, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:31:45,161 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 83 states. [2018-09-30 20:31:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:31:49,636 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:31:49,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:31:49,636 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 42 [2018-09-30 20:31:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:31:49,637 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:31:49,637 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:31:49,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1023, Invalid=5783, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:31:49,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:31:49,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 20:31:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 20:31:49,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 20:31:49,642 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 20:31:49,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:31:49,642 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 20:31:49,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:31:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 20:31:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 20:31:49,642 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:31:49,643 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-09-30 20:31:49,643 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:31:49,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:31:49,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-09-30 20:31:49,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:31:49,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:31:49,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:49,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:31:49,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:31:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:31:53,618 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:31:53,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:31:53,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:31:53,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:31:53,745 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 20:31:53,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:31:53,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:32:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:32:02,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:32:02,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 83 [2018-09-30 20:32:02,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 20:32:02,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 20:32:02,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1069, Invalid=6071, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 20:32:02,430 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 85 states. [2018-09-30 20:32:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:32:07,497 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 20:32:07,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:32:07,497 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 43 [2018-09-30 20:32:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:32:07,498 INFO L225 Difference]: With dead ends: 46 [2018-09-30 20:32:07,498 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:32:07,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1069, Invalid=6071, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 20:32:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:32:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:32:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:32:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 20:32:07,504 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 20:32:07,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:32:07,505 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 20:32:07,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 20:32:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 20:32:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:32:07,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:32:07,505 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-09-30 20:32:07,506 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:32:07,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:32:07,506 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-09-30 20:32:07,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:32:07,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:32:07,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:32:07,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:32:07,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:32:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:32:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:32:11,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:32:11,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:32:11,872 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:32:12,010 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 20:32:12,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:32:12,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:32:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:32:21,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:32:21,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-09-30 20:32:21,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 20:32:21,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 20:32:21,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=6366, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:32:21,298 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 87 states. [2018-09-30 20:32:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:32:26,619 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:32:26,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:32:26,620 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 44 [2018-09-30 20:32:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:32:26,621 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:32:26,621 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:32:26,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1116, Invalid=6366, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:32:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:32:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:32:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:32:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 20:32:26,626 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 20:32:26,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:32:26,626 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 20:32:26,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 20:32:26,626 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 20:32:26,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 20:32:26,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:32:26,627 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-09-30 20:32:26,627 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:32:26,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:32:26,627 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-09-30 20:32:26,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:32:26,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:32:26,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:32:26,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:32:26,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:32:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:32:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:32:31,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:32:31,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:32:31,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:32:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:32:31,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:32:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:32:41,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:32:41,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 87 [2018-09-30 20:32:41,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 20:32:41,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 20:32:41,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=6668, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 20:32:41,397 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 89 states. Received shutdown request... [2018-09-30 20:32:42,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:32:42,266 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:32:42,273 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:32:42,273 INFO L202 PluginConnector]: Adding new model GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:32:42 BoogieIcfgContainer [2018-09-30 20:32:42,273 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:32:42,274 INFO L168 Benchmark]: Toolchain (without parser) took 268904.98 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 53.5 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 96.6 MB). Peak memory consumption was 150.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:32:42,276 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:32:42,276 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:32:42,276 INFO L168 Benchmark]: Boogie Preprocessor took 23.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:32:42,277 INFO L168 Benchmark]: RCFGBuilder took 273.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:32:42,277 INFO L168 Benchmark]: TraceAbstraction took 268555.35 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 53.5 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 75.5 MB). Peak memory consumption was 129.0 MB. Max. memory is 7.1 GB. [2018-09-30 20:32:42,280 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 273.71 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 268555.35 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 53.5 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 75.5 MB). Peak memory consumption was 129.0 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 (46states) and FLOYD_HOARE automaton (currently 11 states, 89 states before enhancement), while ReachableStatesComputation was computing reachable states (9 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 268.4s OverallTime, 44 OverallIterations, 43 TraceHistogramMax, 76.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 88 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 33487 SolverSat, 946 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 70.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1979 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1936 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13244 ImplicationChecksByTransitivity, 181.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=43, 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: 0.1s AutomataMinimizationTime, 43 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 186.7s InterpolantComputationTime, 2066 NumberOfCodeBlocks, 2066 NumberOfCodeBlocksAsserted, 339 NumberOfCheckSat, 1979 ConstructedInterpolants, 0 QuantifiedInterpolants, 569581 SizeOfPredicates, 43 NumberOfNonLiveVariables, 4085 ConjunctsInSsa, 2021 ConjunctsInUnsatCore, 87 InterpolantComputations, 1 PerfectInterpolantSequences, 0/28380 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/GeometricalCake.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-32-42-290.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/GeometricalCake.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-32-42-290.csv Completed graceful shutdown