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 0.1.23-2eb0a67 [2018-10-03 08:56:59,253 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:56:59,257 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:56:59,270 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:56:59,271 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:56:59,272 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:56:59,273 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:56:59,275 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:56:59,276 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:56:59,277 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:56:59,278 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 08:56:59,278 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 08:56:59,279 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 08:56:59,280 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 08:56:59,281 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 08:56:59,282 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 08:56:59,283 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 08:56:59,285 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 08:56:59,287 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 08:56:59,288 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 08:56:59,289 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 08:56:59,290 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 08:56:59,293 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-03 08:56:59,301 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-03 08:56:59,333 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:56:59,333 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:56:59,337 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:56:59,337 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:56:59,338 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:56:59,338 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:56:59,338 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:56:59,338 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:56:59,338 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:56:59,339 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:56:59,339 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:56:59,339 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:56:59,339 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:56:59,341 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:56:59,341 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:56:59,341 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:56:59,341 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:56:59,341 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:56:59,342 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:56:59,342 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:56:59,342 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:56:59,342 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:56:59,343 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:56:59,343 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:56:59,343 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:56:59,343 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:56:59,343 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:56:59,344 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:56:59,344 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:56:59,344 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:56:59,388 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:56:59,404 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:56:59,409 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:56:59,411 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:56:59,411 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:56:59,412 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl [2018-10-03 08:56:59,412 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/HierarchicalTraceAbstraction/GeometricalCake.bpl' [2018-10-03 08:56:59,462 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:56:59,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:56:59,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:56:59,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:56:59,466 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:56:59,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:59" (1/1) ... [2018-10-03 08:56:59,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:59" (1/1) ... [2018-10-03 08:56:59,503 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 08:56:59,503 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 08:56:59,503 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 08:56:59,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:56:59,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:56:59,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:56:59,506 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:56:59,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:59" (1/1) ... [2018-10-03 08:56:59,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:59" (1/1) ... [2018-10-03 08:56:59,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:59" (1/1) ... [2018-10-03 08:56:59,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:59" (1/1) ... [2018-10-03 08:56:59,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:59" (1/1) ... [2018-10-03 08:56:59,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:59" (1/1) ... [2018-10-03 08:56:59,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:59" (1/1) ... [2018-10-03 08:56:59,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:56:59,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:56:59,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:56:59,526 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:56:59,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:56:59,596 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-03 08:56:59,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-03 08:56:59,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-03 08:56:59,784 INFO L337 CfgBuilder]: Using library mode [2018-10-03 08:56:59,785 INFO L202 PluginConnector]: Adding new model GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:56:59 BoogieIcfgContainer [2018-10-03 08:56:59,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:56:59,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:56:59,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:56:59,790 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:56:59,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:56:59" (1/2) ... [2018-10-03 08:56:59,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa9d193 and model type GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:56:59, skipping insertion in model container [2018-10-03 08:56:59,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:56:59" (2/2) ... [2018-10-03 08:56:59,793 INFO L112 eAbstractionObserver]: Analyzing ICFG GeometricalCake.bpl [2018-10-03 08:56:59,803 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:56:59,815 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:56:59,869 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:56:59,870 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:56:59,870 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:56:59,870 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:56:59,870 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:56:59,871 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:56:59,871 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:56:59,871 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:56:59,871 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:56:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-03 08:56:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2018-10-03 08:56:59,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:59,898 INFO L375 BasicCegarLoop]: trace histogram [1, 1] [2018-10-03 08:56:59,900 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:59,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:59,909 INFO L82 PathProgramCache]: Analyzing trace with hash 967, now seen corresponding path program 1 times [2018-10-03 08:56:59,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:59,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:59,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:59,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:59,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:00,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:57:00,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-10-03 08:57:00,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:57:00,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:57:00,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:57:00,090 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-03 08:57:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:00,143 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 08:57:00,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:57:00,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2018-10-03 08:57:00,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:00,155 INFO L225 Difference]: With dead ends: 9 [2018-10-03 08:57:00,155 INFO L226 Difference]: Without dead ends: 4 [2018-10-03 08:57:00,159 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 [2018-10-03 08:57:00,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2018-10-03 08:57:00,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2018-10-03 08:57:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-10-03 08:57:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 4 transitions. [2018-10-03 08:57:00,193 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 4 transitions. Word has length 2 [2018-10-03 08:57:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:00,193 INFO L480 AbstractCegarLoop]: Abstraction has 4 states and 4 transitions. [2018-10-03 08:57:00,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:57:00,194 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 4 transitions. [2018-10-03 08:57:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-03 08:57:00,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:00,194 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-03 08:57:00,195 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:00,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:00,195 INFO L82 PathProgramCache]: Analyzing trace with hash 29921, now seen corresponding path program 1 times [2018-10-03 08:57:00,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:00,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:00,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:00,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:00,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:00,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:00,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:00,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:00,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:00,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 3 [2018-10-03 08:57:00,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:57:00,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:57:00,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:57:00,529 INFO L87 Difference]: Start difference. First operand 4 states and 4 transitions. Second operand 5 states. [2018-10-03 08:57:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:00,580 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2018-10-03 08:57:00,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:57:00,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 3 [2018-10-03 08:57:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:00,582 INFO L225 Difference]: With dead ends: 6 [2018-10-03 08:57:00,582 INFO L226 Difference]: Without dead ends: 5 [2018-10-03 08:57:00,584 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 [2018-10-03 08:57:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-03 08:57:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-03 08:57:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-03 08:57:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-03 08:57:00,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-03 08:57:00,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:00,587 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-03 08:57:00,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:57:00,587 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-03 08:57:00,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 08:57:00,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:00,588 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1] [2018-10-03 08:57:00,588 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:00,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:00,588 INFO L82 PathProgramCache]: Analyzing trace with hash 927495, now seen corresponding path program 2 times [2018-10-03 08:57:00,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:00,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:00,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:00,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:00,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:00,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:00,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:00,721 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:00,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:00,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:00,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:00,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2018-10-03 08:57:00,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:57:00,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:57:00,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:57:00,864 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 7 states. [2018-10-03 08:57:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:00,914 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2018-10-03 08:57:00,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:57:00,914 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 4 [2018-10-03 08:57:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:00,915 INFO L225 Difference]: With dead ends: 7 [2018-10-03 08:57:00,915 INFO L226 Difference]: Without dead ends: 6 [2018-10-03 08:57:00,916 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 [2018-10-03 08:57:00,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-03 08:57:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-03 08:57:00,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-03 08:57:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-03 08:57:00,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-03 08:57:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:00,919 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-03 08:57:00,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:57:00,919 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-03 08:57:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 08:57:00,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:00,920 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1] [2018-10-03 08:57:00,920 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:00,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash 28752289, now seen corresponding path program 3 times [2018-10-03 08:57:00,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:00,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:00,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:00,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:01,116 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 [2018-10-03 08:57:01,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:01,172 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 08:57:01,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:01,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:01,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-10-03 08:57:01,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:57:01,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:57:01,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:57:01,405 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 9 states. [2018-10-03 08:57:01,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:01,444 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-03 08:57:01,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:57:01,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2018-10-03 08:57:01,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:01,445 INFO L225 Difference]: With dead ends: 8 [2018-10-03 08:57:01,445 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 08:57:01,445 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 [2018-10-03 08:57:01,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 08:57:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 08:57:01,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 08:57:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 08:57:01,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-03 08:57:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:01,449 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 08:57:01,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:57:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 08:57:01,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:57:01,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:01,450 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1] [2018-10-03 08:57:01,450 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:01,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:01,451 INFO L82 PathProgramCache]: Analyzing trace with hash 891320903, now seen corresponding path program 4 times [2018-10-03 08:57:01,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:01,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:01,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:01,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:01,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:01,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:01,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:01,574 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:01,595 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:01,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:01,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:01,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-03 08:57:01,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:01,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:01,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:01,825 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 11 states. [2018-10-03 08:57:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:01,935 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 08:57:01,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:57:01,935 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2018-10-03 08:57:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:01,936 INFO L225 Difference]: With dead ends: 9 [2018-10-03 08:57:01,936 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 08:57:01,936 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 [2018-10-03 08:57:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 08:57:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 08:57:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 08:57:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-03 08:57:01,939 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-03 08:57:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:01,939 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-03 08:57:01,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-03 08:57:01,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:57:01,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:01,940 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1] [2018-10-03 08:57:01,940 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:01,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:01,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144161, now seen corresponding path program 5 times [2018-10-03 08:57:01,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:01,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:01,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:01,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:01,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:02,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:02,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:02,087 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:02,096 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 08:57:02,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:02,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:02,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:02,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-03 08:57:02,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:57:02,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:57:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:57:02,596 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 13 states. [2018-10-03 08:57:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:02,689 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-03 08:57:02,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:57:02,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 7 [2018-10-03 08:57:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:02,690 INFO L225 Difference]: With dead ends: 10 [2018-10-03 08:57:02,691 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:57:02,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:57:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:57:02,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:57:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:57:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 08:57:02,696 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-03 08:57:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:02,696 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 08:57:02,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:57:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 08:57:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:57:02,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:02,697 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1] [2018-10-03 08:57:02,697 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:02,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:02,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894087, now seen corresponding path program 6 times [2018-10-03 08:57:02,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:02,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:02,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:02,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:02,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:02,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:02,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:02,901 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:02,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 08:57:02,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:02,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:03,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:03,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-03 08:57:03,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:57:03,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:57:03,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:57:03,125 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 15 states. [2018-10-03 08:57:03,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:03,494 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 08:57:03,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:57:03,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 8 [2018-10-03 08:57:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:03,496 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:57:03,496 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 08:57:03,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:57:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 08:57:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 08:57:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:57:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-03 08:57:03,501 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-03 08:57:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:03,501 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-03 08:57:03,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:57:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-03 08:57:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:57:03,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:03,502 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1] [2018-10-03 08:57:03,502 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:03,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141793, now seen corresponding path program 7 times [2018-10-03 08:57:03,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:03,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:03,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:03,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:03,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:03,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:03,782 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 [2018-10-03 08:57:03,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:03,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:04,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:04,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-10-03 08:57:04,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:57:04,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:57:04,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:57:04,268 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 17 states. [2018-10-03 08:57:04,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:04,401 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-03 08:57:04,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:57:04,401 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 9 [2018-10-03 08:57:04,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:04,402 INFO L225 Difference]: With dead ends: 12 [2018-10-03 08:57:04,402 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:57:04,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:57:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:57:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:57:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:57:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 08:57:04,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-03 08:57:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:04,408 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 08:57:04,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:57:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 08:57:04,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:57:04,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:04,409 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1] [2018-10-03 08:57:04,409 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:04,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:04,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820679, now seen corresponding path program 8 times [2018-10-03 08:57:04,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:04,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:04,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:04,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:04,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:04,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:04,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:04,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:04,793 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:04,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:04,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:05,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:05,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-03 08:57:05,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:57:05,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:57:05,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:57:05,109 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 19 states. [2018-10-03 08:57:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:05,230 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 08:57:05,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:05,232 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 10 [2018-10-03 08:57:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:05,233 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:57:05,233 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 08:57:05,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:57:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 08:57:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-03 08:57:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:57:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-03 08:57:05,238 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-03 08:57:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:05,238 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-03 08:57:05,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:57:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-03 08:57:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:57:05,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:05,239 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1] [2018-10-03 08:57:05,239 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:05,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:05,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166559, now seen corresponding path program 9 times [2018-10-03 08:57:05,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:05,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:05,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:05,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:05,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:05,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:05,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:05,592 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:05,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:57:05,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:05,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:06,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:06,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-03 08:57:06,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:57:06,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:57:06,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:57:06,069 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 21 states. [2018-10-03 08:57:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:06,239 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-03 08:57:06,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:57:06,239 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 11 [2018-10-03 08:57:06,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:06,240 INFO L225 Difference]: With dead ends: 14 [2018-10-03 08:57:06,240 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:57:06,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:57:06,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:57:06,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:57:06,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:57:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 08:57:06,244 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-03 08:57:06,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:06,244 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 08:57:06,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:57:06,245 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 08:57:06,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:57:06,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:06,245 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1] [2018-10-03 08:57:06,246 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:06,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:06,246 INFO L82 PathProgramCache]: Analyzing trace with hash -562523129, now seen corresponding path program 10 times [2018-10-03 08:57:06,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:06,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:06,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:06,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:06,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:06,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:06,517 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:06,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:06,535 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:06,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:06,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:06,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:06,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-03 08:57:06,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:57:06,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:57:06,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:57:06,929 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 23 states. [2018-10-03 08:57:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:07,408 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 08:57:07,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:57:07,409 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 12 [2018-10-03 08:57:07,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:07,410 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:57:07,410 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 08:57:07,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:57:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 08:57:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-03 08:57:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:57:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-03 08:57:07,415 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-03 08:57:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:07,415 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-03 08:57:07,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:57:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-03 08:57:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:57:07,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:07,416 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1] [2018-10-03 08:57:07,416 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:07,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:07,416 INFO L82 PathProgramCache]: Analyzing trace with hash -258347871, now seen corresponding path program 11 times [2018-10-03 08:57:07,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:07,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:07,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:07,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:07,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:08,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:08,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:08,041 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:08,053 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:57:08,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:08,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:08,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:08,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-10-03 08:57:08,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:57:08,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:57:08,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:57:08,556 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 25 states. [2018-10-03 08:57:08,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:08,998 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-03 08:57:08,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:57:08,999 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 13 [2018-10-03 08:57:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:08,999 INFO L225 Difference]: With dead ends: 16 [2018-10-03 08:57:08,999 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:57:09,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:57:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:57:09,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:57:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:57:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 08:57:09,005 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-03 08:57:09,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:09,005 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 08:57:09,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:57:09,006 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 08:57:09,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:57:09,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:09,006 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1] [2018-10-03 08:57:09,008 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:09,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:09,009 INFO L82 PathProgramCache]: Analyzing trace with hash 581150535, now seen corresponding path program 12 times [2018-10-03 08:57:09,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:09,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:09,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:09,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:09,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:09,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:09,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:09,488 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:09,501 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:57:09,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:09,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:10,012 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:10,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:10,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-10-03 08:57:10,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:57:10,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:57:10,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:57:10,035 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 27 states. [2018-10-03 08:57:10,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:10,345 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 08:57:10,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:57:10,345 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 14 [2018-10-03 08:57:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:10,346 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:57:10,346 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 08:57:10,347 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 [2018-10-03 08:57:10,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 08:57:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 08:57:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:57:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-03 08:57:10,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-03 08:57:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:10,352 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-03 08:57:10,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:57:10,353 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-03 08:57:10,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:57:10,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:10,353 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1] [2018-10-03 08:57:10,354 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:10,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:10,354 INFO L82 PathProgramCache]: Analyzing trace with hash 835797345, now seen corresponding path program 13 times [2018-10-03 08:57:10,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:10,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:10,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:10,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:10,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:10,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:10,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:10,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:10,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:11,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:11,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-10-03 08:57:11,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:57:11,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:57:11,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:57:11,356 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 29 states. [2018-10-03 08:57:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:11,749 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-03 08:57:11,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:57:11,750 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 15 [2018-10-03 08:57:11,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:11,751 INFO L225 Difference]: With dead ends: 18 [2018-10-03 08:57:11,751 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:57:11,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:57:11,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:57:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:57:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:57:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 08:57:11,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-03 08:57:11,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:11,757 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 08:57:11,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:57:11,757 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 08:57:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:57:11,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:11,758 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1] [2018-10-03 08:57:11,758 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:11,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:11,758 INFO L82 PathProgramCache]: Analyzing trace with hash 139913863, now seen corresponding path program 14 times [2018-10-03 08:57:11,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:11,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:11,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:11,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:11,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:12,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:12,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:12,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:12,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:12,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:12,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:13,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:13,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-10-03 08:57:13,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:57:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:57:13,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:57:13,125 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 31 states. [2018-10-03 08:57:13,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:13,484 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 08:57:13,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:57:13,485 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 16 [2018-10-03 08:57:13,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:13,486 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:57:13,486 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 08:57:13,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:57:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 08:57:13,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-03 08:57:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:57:13,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-03 08:57:13,491 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-03 08:57:13,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:13,491 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-03 08:57:13,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:57:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-03 08:57:13,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:57:13,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:13,492 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1] [2018-10-03 08:57:13,493 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:13,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:13,493 INFO L82 PathProgramCache]: Analyzing trace with hash 42362401, now seen corresponding path program 15 times [2018-10-03 08:57:13,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:13,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:13,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:13,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:13,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:14,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:14,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:14,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:14,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:57:14,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:14,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:15,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:15,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-10-03 08:57:15,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:57:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:57:15,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:57:15,928 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 33 states. [2018-10-03 08:57:16,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:16,437 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-03 08:57:16,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:57:16,437 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 17 [2018-10-03 08:57:16,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:16,438 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:57:16,438 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:57:16,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:57:16,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:57:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:57:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:57:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 08:57:16,445 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-03 08:57:16,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:16,446 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 08:57:16,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:57:16,446 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 08:57:16,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:57:16,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:16,447 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1] [2018-10-03 08:57:16,447 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:16,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:16,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234375, now seen corresponding path program 16 times [2018-10-03 08:57:16,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:16,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:16,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:16,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:16,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:16,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:16,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:17,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:17,018 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:17,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:17,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:17,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:17,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-10-03 08:57:17,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:57:17,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:57:17,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:57:17,800 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 35 states. [2018-10-03 08:57:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:18,461 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 08:57:18,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:57:18,462 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 18 [2018-10-03 08:57:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:18,462 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:57:18,463 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 08:57:18,464 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 [2018-10-03 08:57:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 08:57:18,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-03 08:57:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:57:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-03 08:57:18,468 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-03 08:57:18,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:18,468 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-03 08:57:18,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:57:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-03 08:57:18,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:18,469 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:18,469 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1] [2018-10-03 08:57:18,469 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:18,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2055559905, now seen corresponding path program 17 times [2018-10-03 08:57:18,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:18,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:18,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:18,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:18,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:19,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:19,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:19,820 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:19,906 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 08:57:19,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:19,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:20,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:20,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-10-03 08:57:20,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:57:20,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:57:20,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:57:20,780 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 37 states. [2018-10-03 08:57:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:21,442 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-03 08:57:21,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:57:21,443 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 19 [2018-10-03 08:57:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:21,444 INFO L225 Difference]: With dead ends: 22 [2018-10-03 08:57:21,444 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:57:21,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:57:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:57:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:57:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:57:21,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 08:57:21,449 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-03 08:57:21,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:21,449 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 08:57:21,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:57:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 08:57:21,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:57:21,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:21,450 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1] [2018-10-03 08:57:21,450 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:21,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:21,451 INFO L82 PathProgramCache]: Analyzing trace with hash -702152441, now seen corresponding path program 18 times [2018-10-03 08:57:21,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:21,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:21,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:21,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:21,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:22,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:22,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:22,026 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:22,047 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-03 08:57:22,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:22,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:23,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:23,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-10-03 08:57:23,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:57:23,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:57:23,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:57:23,175 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 39 states. [2018-10-03 08:57:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:23,940 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 08:57:23,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:57:23,941 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 20 [2018-10-03 08:57:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:23,941 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:57:23,941 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 08:57:23,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:57:23,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 08:57:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-03 08:57:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:57:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-03 08:57:23,947 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-03 08:57:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:23,947 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-03 08:57:23,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:57:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-03 08:57:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-03 08:57:23,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:23,948 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1] [2018-10-03 08:57:23,948 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:23,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:23,949 INFO L82 PathProgramCache]: Analyzing trace with hash -291889247, now seen corresponding path program 19 times [2018-10-03 08:57:23,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:23,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:23,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:23,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:23,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:24,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:24,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:24,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:24,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:26,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:26,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2018-10-03 08:57:26,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:57:26,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:57:26,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:57:26,002 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 41 states. [2018-10-03 08:57:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:26,935 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-03 08:57:26,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:57:26,936 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 21 [2018-10-03 08:57:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:26,936 INFO L225 Difference]: With dead ends: 24 [2018-10-03 08:57:26,936 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:57:26,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:57:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:57:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:57:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:57:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 08:57:26,946 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-03 08:57:26,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:26,947 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 08:57:26,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:57:26,947 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 08:57:26,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:57:26,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:26,948 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1] [2018-10-03 08:57:26,948 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:26,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:26,948 INFO L82 PathProgramCache]: Analyzing trace with hash -458632121, now seen corresponding path program 20 times [2018-10-03 08:57:26,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:26,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:26,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:26,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:26,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:27,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:27,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:27,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:27,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:27,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:27,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:29,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:29,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-10-03 08:57:29,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:57:29,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:57:29,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:57:29,110 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 43 states. [2018-10-03 08:57:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:30,052 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 08:57:30,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:57:30,052 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 22 [2018-10-03 08:57:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:30,053 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:57:30,053 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 08:57:30,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=313, Invalid=1493, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:57:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 08:57:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-03 08:57:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:57:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-03 08:57:30,057 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-03 08:57:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:30,057 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-03 08:57:30,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:57:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-03 08:57:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 08:57:30,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:30,058 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1] [2018-10-03 08:57:30,058 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:30,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:30,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693919, now seen corresponding path program 21 times [2018-10-03 08:57:30,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:30,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:30,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:30,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:30,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:30,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:30,862 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:30,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:30,897 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 08:57:30,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:30,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:32,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:32,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2018-10-03 08:57:32,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:57:32,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:57:32,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:57:32,633 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 45 states. [2018-10-03 08:57:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:33,593 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-03 08:57:33,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:57:33,596 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 23 [2018-10-03 08:57:33,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:33,596 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:57:33,596 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:57:33,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:57:33,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:57:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:57:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:57:33,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 08:57:33,601 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-03 08:57:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:33,601 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 08:57:33,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:57:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 08:57:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:57:33,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:33,602 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1] [2018-10-03 08:57:33,602 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:33,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:33,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161415, now seen corresponding path program 22 times [2018-10-03 08:57:33,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:33,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:33,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:33,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:33,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:34,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:34,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:34,419 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:34,442 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:34,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:34,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:36,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:36,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-10-03 08:57:36,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:57:36,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:57:36,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:57:36,155 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 47 states. [2018-10-03 08:57:37,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:37,269 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 08:57:37,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:57:37,269 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 24 [2018-10-03 08:57:37,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:37,270 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:57:37,270 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 08:57:37,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:57:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 08:57:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-03 08:57:37,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:57:37,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-03 08:57:37,276 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-03 08:57:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:37,277 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-03 08:57:37,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:57:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-03 08:57:37,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-03 08:57:37,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:37,278 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1] [2018-10-03 08:57:37,278 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:37,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:37,278 INFO L82 PathProgramCache]: Analyzing trace with hash -818603743, now seen corresponding path program 23 times [2018-10-03 08:57:37,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:37,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:37,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:37,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:37,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:38,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:38,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:38,142 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:38,173 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 08:57:38,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:38,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:39,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:39,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2018-10-03 08:57:39,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:57:39,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:57:39,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:57:39,980 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 49 states. [2018-10-03 08:57:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:41,673 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-03 08:57:41,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:57:41,673 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 25 [2018-10-03 08:57:41,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:41,674 INFO L225 Difference]: With dead ends: 28 [2018-10-03 08:57:41,674 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:57:41,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:57:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:57:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:57:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:57:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 08:57:41,680 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-03 08:57:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:41,680 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 08:57:41,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:57:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 08:57:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:57:41,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:41,681 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1] [2018-10-03 08:57:41,681 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:41,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:41,682 INFO L82 PathProgramCache]: Analyzing trace with hash 393087687, now seen corresponding path program 24 times [2018-10-03 08:57:41,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:41,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:41,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:41,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:41,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:42,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:42,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:42,886 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:42,928 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:57:42,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:42,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:44,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:44,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-10-03 08:57:44,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:57:44,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:57:44,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2127, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:57:44,883 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 51 states. [2018-10-03 08:57:46,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:46,183 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 08:57:46,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:57:46,184 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 26 [2018-10-03 08:57:46,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:46,184 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:57:46,185 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 08:57:46,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=423, Invalid=2127, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:57:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 08:57:46,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-03 08:57:46,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:57:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-03 08:57:46,191 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-03 08:57:46,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:46,191 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-03 08:57:46,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:57:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-03 08:57:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 08:57:46,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:46,192 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1] [2018-10-03 08:57:46,192 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:46,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:46,193 INFO L82 PathProgramCache]: Analyzing trace with hash -699183647, now seen corresponding path program 25 times [2018-10-03 08:57:46,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:46,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:46,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:46,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:46,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:47,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:47,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:47,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:47,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:51,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:51,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2018-10-03 08:57:51,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:57:51,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:57:51,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2303, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:57:51,056 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 53 states. [2018-10-03 08:57:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:52,378 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-03 08:57:52,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:57:52,379 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 27 [2018-10-03 08:57:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:52,379 INFO L225 Difference]: With dead ends: 30 [2018-10-03 08:57:52,379 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:57:52,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=453, Invalid=2303, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:57:52,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:57:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:57:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:57:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 08:57:52,386 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-03 08:57:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:52,386 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 08:57:52,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:57:52,386 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 08:57:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:57:52,387 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:52,387 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1] [2018-10-03 08:57:52,388 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:52,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:52,388 INFO L82 PathProgramCache]: Analyzing trace with hash -199856633, now seen corresponding path program 26 times [2018-10-03 08:57:52,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:52,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:52,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:52,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:52,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:53,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:53,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:57:53,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:53,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:53,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:53,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:56,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:56,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-10-03 08:57:56,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:57:56,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:57:56,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:57:56,181 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 55 states. [2018-10-03 08:57:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:58,184 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 08:57:58,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:57:58,185 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 28 [2018-10-03 08:57:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:58,186 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:57:58,186 INFO L226 Difference]: Without dead ends: 30 [2018-10-03 08:57:58,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=484, Invalid=2486, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:57:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-03 08:57:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-03 08:57:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:57:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-03 08:57:58,190 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-03 08:57:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:58,190 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-03 08:57:58,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:57:58,191 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-03 08:57:58,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 08:57:58,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:58,191 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1] [2018-10-03 08:57:58,191 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:58,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:58,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588383, now seen corresponding path program 27 times [2018-10-03 08:57:58,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:58,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:58,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:58,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:58,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:00,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:00,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:00,193 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:58:00,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 08:58:00,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:00,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:03,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:03,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2018-10-03 08:58:03,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:58:03,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:58:03,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:58:03,178 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 57 states. [2018-10-03 08:58:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:05,498 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-03 08:58:05,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:58:05,498 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 29 [2018-10-03 08:58:05,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:05,499 INFO L225 Difference]: With dead ends: 32 [2018-10-03 08:58:05,499 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:58:05,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=516, Invalid=2676, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:58:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:58:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:58:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:58:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 08:58:05,506 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-03 08:58:05,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:05,506 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 08:58:05,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 08:58:05,506 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 08:58:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:58:05,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:05,507 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1] [2018-10-03 08:58:05,507 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:05,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:05,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302215, now seen corresponding path program 28 times [2018-10-03 08:58:05,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:05,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:05,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:05,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:05,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:06,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:06,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:06,947 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:58:06,983 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:58:06,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:06,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:09,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:09,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-10-03 08:58:09,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:58:09,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:58:09,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=2873, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:58:09,953 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 59 states. [2018-10-03 08:58:12,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:12,100 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 08:58:12,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:58:12,101 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 30 [2018-10-03 08:58:12,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:12,101 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:58:12,102 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 08:58:12,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=549, Invalid=2873, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:58:12,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 08:58:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-03 08:58:12,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:58:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-03 08:58:12,108 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-03 08:58:12,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:12,108 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-03 08:58:12,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:58:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-03 08:58:12,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-03 08:58:12,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:12,109 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1] [2018-10-03 08:58:12,109 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:12,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:12,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1104337055, now seen corresponding path program 29 times [2018-10-03 08:58:12,110 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:12,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:12,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:12,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:12,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:13,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:13,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:13,699 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:58:13,748 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 08:58:13,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:13,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:17,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:17,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2018-10-03 08:58:17,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 08:58:17,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 08:58:17,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:58:17,040 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 61 states. [2018-10-03 08:58:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:18,957 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-03 08:58:18,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:58:18,958 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 31 [2018-10-03 08:58:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:18,958 INFO L225 Difference]: With dead ends: 34 [2018-10-03 08:58:18,959 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:58:18,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:58:18,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:58:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:58:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:58:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 08:58:18,964 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-03 08:58:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:18,965 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 08:58:18,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 08:58:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 08:58:18,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:58:18,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:18,965 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1] [2018-10-03 08:58:18,965 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:18,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:18,966 INFO L82 PathProgramCache]: Analyzing trace with hash 125289607, now seen corresponding path program 30 times [2018-10-03 08:58:18,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:18,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:18,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:18,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:18,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:20,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:20,822 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:20,833 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:58:20,896 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 08:58:20,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:20,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:24,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:24,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-10-03 08:58:24,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 08:58:24,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 08:58:24,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=3288, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:58:24,482 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 63 states. [2018-10-03 08:58:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:26,881 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 08:58:26,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:58:26,881 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 32 [2018-10-03 08:58:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:26,882 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:58:26,882 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 08:58:26,883 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 [2018-10-03 08:58:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 08:58:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-03 08:58:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:58:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-03 08:58:26,887 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-03 08:58:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:26,887 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-03 08:58:26,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 08:58:26,888 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-03 08:58:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-03 08:58:26,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:26,888 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1] [2018-10-03 08:58:26,889 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:26,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash -410989535, now seen corresponding path program 31 times [2018-10-03 08:58:26,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:26,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:26,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:26,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:26,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:28,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:28,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:28,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:28,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:33,063 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:33,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 63 [2018-10-03 08:58:33,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:58:33,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:58:33,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=654, Invalid=3506, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:58:33,065 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 65 states. [2018-10-03 08:58:35,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:35,979 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-03 08:58:35,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:58:35,979 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 33 [2018-10-03 08:58:35,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:35,980 INFO L225 Difference]: With dead ends: 36 [2018-10-03 08:58:35,980 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:58:35,981 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 [2018-10-03 08:58:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:58:35,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:58:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:58:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 08:58:35,986 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-03 08:58:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:35,986 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 08:58:35,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:58:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 08:58:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:58:35,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:35,987 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1] [2018-10-03 08:58:35,987 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:35,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash 144226247, now seen corresponding path program 32 times [2018-10-03 08:58:35,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:35,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:35,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:35,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:58:35,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:38,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:38,000 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:38,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:58:38,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:58:38,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:38,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:42,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:42,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-10-03 08:58:42,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 08:58:42,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 08:58:42,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:58:42,250 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 67 states. [2018-10-03 08:58:45,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:45,807 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 08:58:45,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:58:45,808 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 34 [2018-10-03 08:58:45,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:45,809 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:58:45,809 INFO L226 Difference]: Without dead ends: 36 [2018-10-03 08:58:45,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=691, Invalid=3731, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:58:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-03 08:58:45,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-03 08:58:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 08:58:45,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-03 08:58:45,815 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-03 08:58:45,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:45,815 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-03 08:58:45,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 08:58:45,816 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-03 08:58:45,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-03 08:58:45,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:45,816 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1] [2018-10-03 08:58:45,816 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:45,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash 176046305, now seen corresponding path program 33 times [2018-10-03 08:58:45,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:45,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:45,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:45,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:45,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:48,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:48,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:48,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:58:48,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 08:58:48,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:48,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:58:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:52,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:58:52,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2018-10-03 08:58:52,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 08:58:52,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 08:58:52,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=729, Invalid=3963, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:58:52,740 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 69 states. [2018-10-03 08:58:55,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:58:55,871 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-03 08:58:55,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:58:55,871 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 35 [2018-10-03 08:58:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:58:55,872 INFO L225 Difference]: With dead ends: 38 [2018-10-03 08:58:55,872 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:58:55,873 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 [2018-10-03 08:58:55,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:58:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:58:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:58:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 08:58:55,879 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-03 08:58:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:58:55,879 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 08:58:55,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 08:58:55,879 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 08:58:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:58:55,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:58:55,880 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1] [2018-10-03 08:58:55,880 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:58:55,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:58:55,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468103, now seen corresponding path program 34 times [2018-10-03 08:58:55,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:58:55,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:58:55,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:55,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:58:55,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:58:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:58:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:58:58,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:58:58,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:58:58,267 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:58:58,319 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:58:58,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:58:58,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:03,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:03,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-10-03 08:59:03,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:59:03,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:59:03,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:59:03,326 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 71 states. [2018-10-03 08:59:07,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:07,360 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 08:59:07,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:59:07,361 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 36 [2018-10-03 08:59:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:07,361 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:59:07,361 INFO L226 Difference]: Without dead ends: 38 [2018-10-03 08:59:07,362 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 [2018-10-03 08:59:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-03 08:59:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-03 08:59:07,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 08:59:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-03 08:59:07,366 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-03 08:59:07,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:07,366 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-03 08:59:07,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:59:07,366 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-03 08:59:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 08:59:07,367 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:07,367 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1] [2018-10-03 08:59:07,367 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:07,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:07,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772769, now seen corresponding path program 35 times [2018-10-03 08:59:07,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:07,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:07,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:07,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:07,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:09,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:09,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:09,912 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:59:09,987 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:59:09,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:10,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:15,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:15,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2018-10-03 08:59:15,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 08:59:15,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 08:59:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=808, Invalid=4448, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:59:15,415 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 73 states. [2018-10-03 08:59:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:19,099 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-03 08:59:19,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:59:19,100 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 37 [2018-10-03 08:59:19,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:19,101 INFO L225 Difference]: With dead ends: 40 [2018-10-03 08:59:19,101 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:59:19,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=808, Invalid=4448, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:59:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:59:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:59:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:59:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 08:59:19,107 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-03 08:59:19,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:19,107 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 08:59:19,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 08:59:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 08:59:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:59:19,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:19,108 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1] [2018-10-03 08:59:19,108 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:19,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:19,108 INFO L82 PathProgramCache]: Analyzing trace with hash 440348231, now seen corresponding path program 36 times [2018-10-03 08:59:19,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:19,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:19,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:19,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:19,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:21,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:21,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:21,879 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:59:21,942 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:59:21,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:21,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:27,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:27,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-10-03 08:59:27,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:59:27,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:59:27,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=4701, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:59:27,698 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 75 states. [2018-10-03 08:59:32,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:32,426 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 08:59:32,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:59:32,427 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 38 [2018-10-03 08:59:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:32,427 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:59:32,428 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 08:59:32,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=849, Invalid=4701, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:59:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 08:59:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-03 08:59:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 08:59:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-03 08:59:32,432 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-03 08:59:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:32,433 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-03 08:59:32,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:59:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-03 08:59:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-03 08:59:32,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:32,433 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1] [2018-10-03 08:59:32,434 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:32,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:32,434 INFO L82 PathProgramCache]: Analyzing trace with hash 765893217, now seen corresponding path program 37 times [2018-10-03 08:59:32,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:32,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:32,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:32,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:59:32,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:35,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:35,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:35,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:59:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:35,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:41,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:41,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 75 [2018-10-03 08:59:41,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:59:41,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:59:41,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=4961, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:59:41,606 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 77 states. [2018-10-03 08:59:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:59:46,344 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-03 08:59:46,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:59:46,345 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 39 [2018-10-03 08:59:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:59:46,346 INFO L225 Difference]: With dead ends: 42 [2018-10-03 08:59:46,346 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:59:46,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=891, Invalid=4961, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:59:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:59:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:59:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:59:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-03 08:59:46,350 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-03 08:59:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:59:46,350 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-03 08:59:46,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:59:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-03 08:59:46,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:59:46,351 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:59:46,351 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1] [2018-10-03 08:59:46,351 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:59:46,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:59:46,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2027114105, now seen corresponding path program 38 times [2018-10-03 08:59:46,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:59:46,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:59:46,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:46,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:59:46,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:59:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:59:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:49,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:59:49,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:59:49,460 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:59:49,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:59:49,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:59:49,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:59:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:59:56,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:59:56,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-10-03 08:59:56,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 08:59:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 08:59:56,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=934, Invalid=5228, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:59:56,224 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 79 states. [2018-10-03 09:00:00,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:00,922 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-03 09:00:00,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 09:00:00,922 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 40 [2018-10-03 09:00:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:00,923 INFO L225 Difference]: With dead ends: 43 [2018-10-03 09:00:00,923 INFO L226 Difference]: Without dead ends: 42 [2018-10-03 09:00:00,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=934, Invalid=5228, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 09:00:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-03 09:00:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-03 09:00:00,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 09:00:00,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-03 09:00:00,929 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-03 09:00:00,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:00,930 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-03 09:00:00,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 09:00:00,930 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-03 09:00:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 09:00:00,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:00,930 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1] [2018-10-03 09:00:00,931 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:00,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972129, now seen corresponding path program 39 times [2018-10-03 09:00:00,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:00,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:00,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:00,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:00,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:04,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:04,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:04,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:00:04,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 09:00:04,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:04,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:11,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:11,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 79 [2018-10-03 09:00:11,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-03 09:00:11,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-03 09:00:11,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=978, Invalid=5502, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 09:00:11,584 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 81 states. [2018-10-03 09:00:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:16,230 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-03 09:00:16,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 09:00:16,231 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 41 [2018-10-03 09:00:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:16,231 INFO L225 Difference]: With dead ends: 44 [2018-10-03 09:00:16,231 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 09:00:16,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=978, Invalid=5502, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 09:00:16,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 09:00:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 09:00:16,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 09:00:16,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 09:00:16,237 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-03 09:00:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:16,237 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 09:00:16,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-03 09:00:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 09:00:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 09:00:16,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:16,238 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1] [2018-10-03 09:00:16,238 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:16,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:16,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495687, now seen corresponding path program 40 times [2018-10-03 09:00:16,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:16,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:16,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:16,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:16,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:19,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:19,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:19,900 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:00:19,968 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:00:19,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:19,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:27,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:27,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-10-03 09:00:27,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 09:00:27,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 09:00:27,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=5783, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 09:00:27,654 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 83 states. [2018-10-03 09:00:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:32,149 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 09:00:32,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 09:00:32,149 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 42 [2018-10-03 09:00:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:32,150 INFO L225 Difference]: With dead ends: 45 [2018-10-03 09:00:32,150 INFO L226 Difference]: Without dead ends: 44 [2018-10-03 09:00:32,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1023, Invalid=5783, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 09:00:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-03 09:00:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-03 09:00:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-03 09:00:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-03 09:00:32,155 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-03 09:00:32,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:32,155 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-03 09:00:32,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 09:00:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-03 09:00:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-03 09:00:32,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:32,156 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1] [2018-10-03 09:00:32,156 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:32,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:32,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791393, now seen corresponding path program 41 times [2018-10-03 09:00:32,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:32,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:32,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:32,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:32,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:36,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:36,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:36,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:00:36,161 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 09:00:36,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:36,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:00:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:44,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:00:44,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 83 [2018-10-03 09:00:44,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-03 09:00:44,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-03 09:00:44,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1069, Invalid=6071, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 09:00:44,558 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 85 states. [2018-10-03 09:00:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:00:49,568 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-03 09:00:49,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 09:00:49,568 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 43 [2018-10-03 09:00:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:00:49,569 INFO L225 Difference]: With dead ends: 46 [2018-10-03 09:00:49,569 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 09:00:49,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1069, Invalid=6071, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 09:00:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 09:00:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 09:00:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 09:00:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-03 09:00:49,575 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-03 09:00:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:00:49,576 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-03 09:00:49,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-03 09:00:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-03 09:00:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 09:00:49,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:00:49,576 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1] [2018-10-03 09:00:49,577 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:00:49,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:00:49,577 INFO L82 PathProgramCache]: Analyzing trace with hash -692041721, now seen corresponding path program 42 times [2018-10-03 09:00:49,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:00:49,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:00:49,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:49,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:00:49,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:00:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:00:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:00:53,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:00:53,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:00:53,825 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:00:53,958 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-03 09:00:53,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:00:54,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:01:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:01:02,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:01:02,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-10-03 09:01:02,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-03 09:01:02,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-03 09:01:02,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1116, Invalid=6366, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 09:01:02,982 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 87 states. [2018-10-03 09:01:08,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:01:08,246 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-03 09:01:08,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 09:01:08,247 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 44 [2018-10-03 09:01:08,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:01:08,248 INFO L225 Difference]: With dead ends: 47 [2018-10-03 09:01:08,248 INFO L226 Difference]: Without dead ends: 46 [2018-10-03 09:01:08,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1116, Invalid=6366, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 09:01:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-03 09:01:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-03 09:01:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 09:01:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-03 09:01:08,254 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-03 09:01:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:01:08,254 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-03 09:01:08,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-03 09:01:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-03 09:01:08,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-03 09:01:08,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:01:08,255 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1] [2018-10-03 09:01:08,255 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:01:08,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 09:01:08,255 INFO L82 PathProgramCache]: Analyzing trace with hash 21543073, now seen corresponding path program 43 times [2018-10-03 09:01:08,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:01:08,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:01:08,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:01:08,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:01:08,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:01:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:01:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:01:12,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:01:12,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:01:12,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:01:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:01:12,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:01:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:01:22,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:01:22,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 87 [2018-10-03 09:01:22,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 09:01:22,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 09:01:22,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=6668, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 09:01:22,532 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 89 states. Received shutdown request... [2018-10-03 09:01:28,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 09:01:28,034 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 09:01:28,041 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 09:01:28,041 INFO L202 PluginConnector]: Adding new model GeometricalCake.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 09:01:28 BoogieIcfgContainer [2018-10-03 09:01:28,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 09:01:28,042 INFO L168 Benchmark]: Toolchain (without parser) took 268579.53 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 51.9 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 293.5 MB). Peak memory consumption was 345.4 MB. Max. memory is 7.1 GB. [2018-10-03 09:01:28,044 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:01:28,044 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:01:28,045 INFO L168 Benchmark]: Boogie Preprocessor took 19.50 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:01:28,045 INFO L168 Benchmark]: RCFGBuilder took 259.02 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 09:01:28,046 INFO L168 Benchmark]: TraceAbstraction took 268255.41 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 51.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 272.4 MB). Peak memory consumption was 324.3 MB. Max. memory is 7.1 GB. [2018-10-03 09:01:28,048 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 40.03 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 19.50 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 259.02 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 268255.41 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 51.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 272.4 MB). Peak memory consumption was 324.3 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 44 states, 89 states before enhancement), while ReachableStatesComputation was computing reachable states (42 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 5 locations, 1 error locations. TIMEOUT Result, 268.1s OverallTime, 44 OverallIterations, 43 TraceHistogramMax, 81.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 88 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 34991 SolverSat, 946 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 75.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1979 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1936 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13244 ImplicationChecksByTransitivity, 176.7s 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, 181.7s 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-0-2018-10-03_09-01-28-058.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/GeometricalCake.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_09-01-28-058.csv Completed graceful shutdown