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/20170304-DifficultPathPrograms/nested.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:18:37,307 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:18:37,309 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:18:37,320 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:18:37,320 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:18:37,321 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:18:37,322 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:18:37,324 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:18:37,325 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:18:37,326 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:18:37,327 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:18:37,327 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:18:37,328 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:18:37,329 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:18:37,330 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:18:37,331 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:18:37,332 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:18:37,335 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:18:37,341 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:18:37,345 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:18:37,346 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:18:37,348 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:18:37,353 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 20:18:37,370 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:18:37,390 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:18:37,390 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:18:37,391 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:18:37,391 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:18:37,392 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:18:37,392 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:18:37,392 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:18:37,393 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:18:37,393 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:18:37,393 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:18:37,393 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:18:37,393 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:18:37,394 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:18:37,394 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:18:37,394 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:18:37,394 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:18:37,394 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:18:37,394 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:18:37,395 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:18:37,395 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:18:37,395 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:18:37,395 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:18:37,395 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:18:37,396 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:18:37,396 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:18:37,396 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:18:37,396 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:18:37,396 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:18:37,397 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:18:37,397 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:18:37,469 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:18:37,485 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:18:37,490 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:18:37,491 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:18:37,492 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:18:37,493 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl [2018-09-30 20:18:37,494 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl' [2018-09-30 20:18:37,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:18:37,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:18:37,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:18:37,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:18:37,565 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:18:37,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:37" (1/1) ... [2018-09-30 20:18:37,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:37" (1/1) ... [2018-09-30 20:18:37,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:18:37,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:18:37,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:18:37,604 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:18:37,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:37" (1/1) ... [2018-09-30 20:18:37,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:37" (1/1) ... [2018-09-30 20:18:37,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:37" (1/1) ... [2018-09-30 20:18:37,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:37" (1/1) ... [2018-09-30 20:18:37,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:37" (1/1) ... [2018-09-30 20:18:37,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:37" (1/1) ... [2018-09-30 20:18:37,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:37" (1/1) ... [2018-09-30 20:18:37,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:18:37,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:18:37,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:18:37,625 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:18:37,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:18:37,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:18:37,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:18:37,971 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:18:37,971 INFO L202 PluginConnector]: Adding new model nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:18:37 BoogieIcfgContainer [2018-09-30 20:18:37,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:18:37,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:18:37,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:18:37,977 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:18:37,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:18:37" (1/2) ... [2018-09-30 20:18:37,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5f3d7 and model type nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:18:37, skipping insertion in model container [2018-09-30 20:18:37,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:18:37" (2/2) ... [2018-09-30 20:18:37,981 INFO L112 eAbstractionObserver]: Analyzing ICFG nested.i_4.bpl [2018-09-30 20:18:37,991 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:18:38,002 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:18:38,056 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:18:38,057 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:18:38,057 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:18:38,057 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:18:38,057 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:18:38,058 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:18:38,058 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:18:38,058 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:18:38,058 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:18:38,071 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 20:18:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:18:38,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:38,078 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:18:38,079 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:38,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:38,085 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 20:18:38,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:38,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:38,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:38,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:38,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:38,227 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:18:38,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:18:38,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:18:38,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:18:38,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:18:38,247 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 20:18:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:38,320 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-30 20:18:38,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:18:38,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 20:18:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:38,333 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:18:38,333 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:18:38,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:18:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:18:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-09-30 20:18:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:18:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-30 20:18:38,369 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-09-30 20:18:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:38,369 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-30 20:18:38,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:18:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-30 20:18:38,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:18:38,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:38,371 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:18:38,371 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:38,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:38,371 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-09-30 20:18:38,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:38,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:38,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:38,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:38,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:38,488 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:18:38,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:18:38,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:18:38,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:18:38,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:18:38,492 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-09-30 20:18:38,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:38,620 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-09-30 20:18:38,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:18:38,620 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-30 20:18:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:38,621 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:18:38,621 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:18:38,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:18:38,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:18:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:18:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:18:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-30 20:18:38,627 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-30 20:18:38,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:38,627 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-30 20:18:38,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:18:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-30 20:18:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:18:38,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:38,628 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 20:18:38,629 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:38,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:38,629 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-09-30 20:18:38,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:38,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:38,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:38,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:38,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:38,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:38,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:38,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:38,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:38,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:38,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:38,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-09-30 20:18:38,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:18:38,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:18:38,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:18:38,910 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-09-30 20:18:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:38,985 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-30 20:18:38,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:18:38,985 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-30 20:18:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:38,986 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:18:38,986 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:18:38,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:18:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:18:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:18:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:18:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-30 20:18:38,992 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-30 20:18:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:38,993 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-30 20:18:38,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:18:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-30 20:18:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:18:38,994 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:38,994 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 20:18:38,994 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:38,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:38,995 INFO L82 PathProgramCache]: Analyzing trace with hash -928778543, now seen corresponding path program 2 times [2018-09-30 20:18:38,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:38,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:38,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:38,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:38,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:18:39,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:39,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:39,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:18:39,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:18:39,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:39,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 20:18:39,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:39,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2018-09-30 20:18:39,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:18:39,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:18:39,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:18:39,313 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-30 20:18:39,504 WARN L178 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-09-30 20:18:39,720 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-30 20:18:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:39,940 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2018-09-30 20:18:39,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:18:39,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-30 20:18:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:39,942 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:18:39,942 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:18:39,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:18:39,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:18:39,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2018-09-30 20:18:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:18:39,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-30 20:18:39,952 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2018-09-30 20:18:39,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:39,953 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-30 20:18:39,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:18:39,953 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-30 20:18:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:18:39,956 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:39,957 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 3, 2, 2, 1, 1, 1] [2018-09-30 20:18:39,957 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:39,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:39,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1778757007, now seen corresponding path program 3 times [2018-09-30 20:18:39,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:39,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:39,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:39,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:39,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-30 20:18:40,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:40,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:40,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:18:40,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 20:18:40,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:40,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-30 20:18:40,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:40,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2018-09-30 20:18:40,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:18:40,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:18:40,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:18:40,522 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-09-30 20:18:41,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:41,087 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2018-09-30 20:18:41,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:18:41,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-09-30 20:18:41,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:41,091 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:18:41,091 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:18:41,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:18:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:18:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-09-30 20:18:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:18:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-09-30 20:18:41,105 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 24 [2018-09-30 20:18:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:41,105 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-09-30 20:18:41,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:18:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-09-30 20:18:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:18:41,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:41,107 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-09-30 20:18:41,107 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:41,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:41,107 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-09-30 20:18:41,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:41,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:41,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:41,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:41,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-09-30 20:18:41,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:41,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:41,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:18:41,397 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:18:41,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:41,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-09-30 20:18:41,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:41,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-09-30 20:18:41,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:18:41,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:18:41,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:18:41,531 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2018-09-30 20:18:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:41,582 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2018-09-30 20:18:41,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:18:41,583 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2018-09-30 20:18:41,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:41,584 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:18:41,584 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:18:41,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:18:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:18:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:18:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:18:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-09-30 20:18:41,597 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2018-09-30 20:18:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:41,598 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-09-30 20:18:41,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:18:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-09-30 20:18:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:18:41,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:41,600 INFO L375 BasicCegarLoop]: trace histogram [18, 15, 4, 3, 3, 1, 1, 1] [2018-09-30 20:18:41,600 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:41,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:41,601 INFO L82 PathProgramCache]: Analyzing trace with hash -254509681, now seen corresponding path program 5 times [2018-09-30 20:18:41,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:41,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:41,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:41,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:41,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-30 20:18:41,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:41,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:41,744 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:18:41,790 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-30 20:18:41,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:41,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-30 20:18:42,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:42,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-09-30 20:18:42,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:18:42,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:18:42,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:18:42,051 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2018-09-30 20:18:42,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:42,105 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2018-09-30 20:18:42,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:18:42,111 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2018-09-30 20:18:42,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:42,111 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:18:42,112 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:18:42,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:18:42,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:18:42,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:18:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:18:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2018-09-30 20:18:42,125 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2018-09-30 20:18:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:42,125 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2018-09-30 20:18:42,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:18:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2018-09-30 20:18:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:18:42,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:42,127 INFO L375 BasicCegarLoop]: trace histogram [21, 18, 4, 3, 3, 1, 1, 1] [2018-09-30 20:18:42,127 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:42,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:42,128 INFO L82 PathProgramCache]: Analyzing trace with hash -996261859, now seen corresponding path program 6 times [2018-09-30 20:18:42,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:42,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:42,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:42,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:42,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 202 proven. 42 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-30 20:18:42,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:42,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:42,288 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:18:42,309 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-30 20:18:42,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:42,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-30 20:18:42,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:42,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2018-09-30 20:18:42,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:18:42,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:18:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:18:42,475 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 14 states. [2018-09-30 20:18:42,926 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-30 20:18:43,566 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-30 20:18:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:44,352 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2018-09-30 20:18:44,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:18:44,353 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2018-09-30 20:18:44,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:44,355 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:18:44,355 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 20:18:44,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=850, Invalid=1906, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:18:44,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 20:18:44,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2018-09-30 20:18:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:18:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2018-09-30 20:18:44,376 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 52 [2018-09-30 20:18:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:44,377 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2018-09-30 20:18:44,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:18:44,377 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2018-09-30 20:18:44,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:18:44,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:44,380 INFO L375 BasicCegarLoop]: trace histogram [32, 28, 5, 4, 4, 1, 1, 1] [2018-09-30 20:18:44,380 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:44,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash -252111625, now seen corresponding path program 7 times [2018-09-30 20:18:44,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:44,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:44,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:44,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:44,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-09-30 20:18:44,702 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:44,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:44,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:44,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-09-30 20:18:45,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:45,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-09-30 20:18:45,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:18:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:18:45,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:18:45,130 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 19 states. [2018-09-30 20:18:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:45,360 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2018-09-30 20:18:45,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:18:45,362 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2018-09-30 20:18:45,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:45,363 INFO L225 Difference]: With dead ends: 143 [2018-09-30 20:18:45,363 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 20:18:45,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:18:45,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 20:18:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 20:18:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:18:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2018-09-30 20:18:45,401 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2018-09-30 20:18:45,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:45,401 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2018-09-30 20:18:45,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:18:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2018-09-30 20:18:45,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 20:18:45,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:45,405 INFO L375 BasicCegarLoop]: trace histogram [36, 32, 5, 4, 4, 1, 1, 1] [2018-09-30 20:18:45,406 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:45,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:45,406 INFO L82 PathProgramCache]: Analyzing trace with hash 771511391, now seen corresponding path program 8 times [2018-09-30 20:18:45,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:45,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:45,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:45,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:45,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-09-30 20:18:45,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:45,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:45,880 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:18:45,941 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:18:45,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:45,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-09-30 20:18:46,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:46,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-09-30 20:18:46,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:18:46,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:18:46,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:18:46,143 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 21 states. [2018-09-30 20:18:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:46,184 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2018-09-30 20:18:46,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:18:46,187 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2018-09-30 20:18:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:46,187 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:18:46,188 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 20:18:46,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:18:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 20:18:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 20:18:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 20:18:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2018-09-30 20:18:46,206 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2018-09-30 20:18:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:46,206 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2018-09-30 20:18:46,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:18:46,207 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2018-09-30 20:18:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:18:46,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:46,208 INFO L375 BasicCegarLoop]: trace histogram [40, 36, 5, 4, 4, 1, 1, 1] [2018-09-30 20:18:46,209 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:46,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1630563271, now seen corresponding path program 9 times [2018-09-30 20:18:46,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:46,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:46,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:46,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:46,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-09-30 20:18:46,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:46,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:46,392 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:18:46,469 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-30 20:18:46,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:46,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-09-30 20:18:46,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:46,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-09-30 20:18:46,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:18:46,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:18:46,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:18:46,843 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 23 states. [2018-09-30 20:18:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:46,904 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2018-09-30 20:18:46,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:18:46,906 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2018-09-30 20:18:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:46,907 INFO L225 Difference]: With dead ends: 171 [2018-09-30 20:18:46,907 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:18:46,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:18:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:18:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:18:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:18:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2018-09-30 20:18:46,926 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2018-09-30 20:18:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:46,926 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2018-09-30 20:18:46,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:18:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2018-09-30 20:18:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:18:46,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:46,928 INFO L375 BasicCegarLoop]: trace histogram [44, 40, 5, 4, 4, 1, 1, 1] [2018-09-30 20:18:46,928 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:46,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:46,929 INFO L82 PathProgramCache]: Analyzing trace with hash -220374225, now seen corresponding path program 10 times [2018-09-30 20:18:46,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:46,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:46,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:46,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:46,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-30 20:18:47,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:47,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:47,274 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:18:47,332 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:18:47,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:47,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-30 20:18:47,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:47,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-30 20:18:47,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:18:47,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:18:47,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:18:47,474 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 12 states. [2018-09-30 20:18:47,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:47,631 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-09-30 20:18:47,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:18:47,633 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2018-09-30 20:18:47,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:47,634 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:18:47,634 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:18:47,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:18:47,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:18:47,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 125. [2018-09-30 20:18:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 20:18:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2018-09-30 20:18:47,658 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 100 [2018-09-30 20:18:47,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:47,658 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2018-09-30 20:18:47,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:18:47,659 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2018-09-30 20:18:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 20:18:47,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:47,660 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 6, 5, 5, 1, 1, 1] [2018-09-30 20:18:47,661 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:47,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:47,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1446024969, now seen corresponding path program 11 times [2018-09-30 20:18:47,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:47,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:47,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:47,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:47,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-30 20:18:48,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:48,087 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:48,097 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:18:48,173 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 20:18:48,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:48,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-30 20:18:48,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:48,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-30 20:18:48,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:18:48,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:18:48,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:18:48,362 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand 14 states. [2018-09-30 20:18:48,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:48,566 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2018-09-30 20:18:48,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:18:48,568 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2018-09-30 20:18:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:48,570 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:18:48,570 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 20:18:48,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:18:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 20:18:48,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 149. [2018-09-30 20:18:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 20:18:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2018-09-30 20:18:48,598 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 124 [2018-09-30 20:18:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:48,599 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2018-09-30 20:18:48,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:18:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2018-09-30 20:18:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 20:18:48,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:48,601 INFO L375 BasicCegarLoop]: trace histogram [66, 60, 7, 6, 6, 1, 1, 1] [2018-09-30 20:18:48,601 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:48,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:48,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1667523811, now seen corresponding path program 12 times [2018-09-30 20:18:48,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:48,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:48,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:48,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:48,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-30 20:18:48,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:48,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:48,862 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:18:48,973 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 20:18:48,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:48,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-30 20:18:49,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:49,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-30 20:18:49,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:18:49,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:18:49,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:18:49,223 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand 16 states. [2018-09-30 20:18:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:49,384 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2018-09-30 20:18:49,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:18:49,385 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 148 [2018-09-30 20:18:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:49,386 INFO L225 Difference]: With dead ends: 197 [2018-09-30 20:18:49,386 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 20:18:49,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:18:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 20:18:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2018-09-30 20:18:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 20:18:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 180 transitions. [2018-09-30 20:18:49,417 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 180 transitions. Word has length 148 [2018-09-30 20:18:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:49,417 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 180 transitions. [2018-09-30 20:18:49,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:18:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 180 transitions. [2018-09-30 20:18:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 20:18:49,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:49,419 INFO L375 BasicCegarLoop]: trace histogram [77, 70, 8, 7, 7, 1, 1, 1] [2018-09-30 20:18:49,420 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:49,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:49,420 INFO L82 PathProgramCache]: Analyzing trace with hash 107136189, now seen corresponding path program 13 times [2018-09-30 20:18:49,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:49,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:49,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:49,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:49,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-30 20:18:49,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:49,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:49,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:49,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-30 20:18:50,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:50,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-30 20:18:50,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:18:50,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:18:50,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:18:50,015 INFO L87 Difference]: Start difference. First operand 173 states and 180 transitions. Second operand 18 states. [2018-09-30 20:18:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:50,128 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2018-09-30 20:18:50,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:18:50,128 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 172 [2018-09-30 20:18:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:50,129 INFO L225 Difference]: With dead ends: 221 [2018-09-30 20:18:50,129 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 20:18:50,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:18:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 20:18:50,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 197. [2018-09-30 20:18:50,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 20:18:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 205 transitions. [2018-09-30 20:18:50,164 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 205 transitions. Word has length 172 [2018-09-30 20:18:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:50,164 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 205 transitions. [2018-09-30 20:18:50,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:18:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 205 transitions. [2018-09-30 20:18:50,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 20:18:50,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:50,167 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 9, 8, 8, 1, 1, 1] [2018-09-30 20:18:50,167 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:50,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:50,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1927956841, now seen corresponding path program 14 times [2018-09-30 20:18:50,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:50,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:50,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:50,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:18:50,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-30 20:18:50,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:50,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:50,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:18:51,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:18:51,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:51,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-30 20:18:51,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:51,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-30 20:18:51,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:18:51,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:18:51,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:18:51,280 INFO L87 Difference]: Start difference. First operand 197 states and 205 transitions. Second operand 20 states. [2018-09-30 20:18:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:51,416 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2018-09-30 20:18:51,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:18:51,416 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 196 [2018-09-30 20:18:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:51,417 INFO L225 Difference]: With dead ends: 245 [2018-09-30 20:18:51,418 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 20:18:51,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:18:51,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 20:18:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2018-09-30 20:18:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 20:18:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2018-09-30 20:18:51,454 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 196 [2018-09-30 20:18:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:51,455 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2018-09-30 20:18:51,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:18:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2018-09-30 20:18:51,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-30 20:18:51,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:51,458 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 10, 9, 9, 1, 1, 1] [2018-09-30 20:18:51,458 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:51,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1486407055, now seen corresponding path program 15 times [2018-09-30 20:18:51,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:51,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:51,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:51,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:51,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-30 20:18:51,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:18:51,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:18:51,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:18:52,020 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2018-09-30 20:18:52,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:18:52,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:18:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-30 20:18:52,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:18:52,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-30 20:18:52,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:18:52,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:18:52,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:18:52,270 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand 22 states. [2018-09-30 20:18:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:18:52,574 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2018-09-30 20:18:52,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:18:52,574 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 220 [2018-09-30 20:18:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:18:52,576 INFO L225 Difference]: With dead ends: 269 [2018-09-30 20:18:52,576 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 20:18:52,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:18:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 20:18:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 245. [2018-09-30 20:18:52,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 20:18:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 255 transitions. [2018-09-30 20:18:52,627 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 255 transitions. Word has length 220 [2018-09-30 20:18:52,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:18:52,627 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 255 transitions. [2018-09-30 20:18:52,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:18:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 255 transitions. [2018-09-30 20:18:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-30 20:18:52,629 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:18:52,629 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 11, 10, 10, 1, 1, 1] [2018-09-30 20:18:52,629 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:18:52,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:18:52,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1732333643, now seen corresponding path program 16 times [2018-09-30 20:18:52,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:18:52,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:18:52,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:52,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:18:52,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:18:52,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:18:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 12082 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 20:18:58,312 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:18:58,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-09-30 20:18:58,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 20:18:58,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 20:18:58,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 20:18:58,317 INFO L87 Difference]: Start difference. First operand 245 states and 255 transitions. Second operand 103 states. [2018-09-30 20:19:01,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:19:01,225 INFO L93 Difference]: Finished difference Result 10235 states and 10695 transitions. [2018-09-30 20:19:01,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 20:19:01,226 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 244 [2018-09-30 20:19:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:19:01,227 INFO L225 Difference]: With dead ends: 10235 [2018-09-30 20:19:01,227 INFO L226 Difference]: Without dead ends: 0 [2018-09-30 20:19:01,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 20:19:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-30 20:19:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-30 20:19:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-30 20:19:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-30 20:19:01,244 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 244 [2018-09-30 20:19:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:19:01,244 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-30 20:19:01,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 20:19:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-30 20:19:01,244 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-30 20:19:01,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-30 20:19:07,990 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:07,991 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:08,002 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:08,143 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:08,224 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:08,269 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:08,366 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:08,399 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:08,554 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:08,619 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:08,830 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:08,901 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:09,164 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:09,204 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:09,385 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:09,596 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:09,825 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:10,019 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:10,192 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:10,581 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:10,708 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:11,547 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:11,711 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:11,880 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:12,261 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:12,612 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:13,167 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:13,613 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:13,911 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:14,096 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:14,262 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:14,446 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:15,314 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:15,435 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:15,730 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:15,860 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:16,534 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:16,745 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:16,847 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:17,260 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:17,389 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:17,546 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:17,584 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:18,244 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:18,365 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:18,403 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:18,498 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:18,536 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:18,631 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:18,775 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:19,934 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:19,946 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:20,313 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:21,066 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:21,614 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:22,133 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:22,658 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:24,997 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:27,050 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:27,235 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:27,919 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:27,934 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:30,900 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:32,213 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:32,393 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:32,925 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:33,841 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:36,251 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:38,129 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:40,778 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:43,353 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:47,041 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:47,218 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:19:54,767 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:17,786 WARN L178 SmtUtils]: Spent 1.28 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-09-30 20:20:22,296 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,297 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,301 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,364 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,403 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,425 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,474 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,491 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,574 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,612 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,725 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,764 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,922 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:22,948 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:23,055 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:23,108 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:23,236 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:23,352 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:23,579 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:23,806 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:23,879 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:24,385 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:24,474 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:24,565 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:24,801 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:25,078 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:25,485 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:25,906 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:26,203 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:26,368 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:26,512 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:26,690 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:27,572 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:27,702 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:28,001 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:28,138 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:28,789 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:29,002 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:29,118 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:29,569 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:29,707 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:29,839 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:29,870 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:30,443 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:30,592 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:30,637 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:30,755 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:30,801 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:30,917 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:31,206 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:32,385 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:32,397 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:32,746 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:33,381 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:33,895 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:34,402 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:35,016 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:37,030 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:39,180 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:39,364 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:39,903 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:39,916 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:42,807 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:43,854 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:44,042 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:44,628 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:45,549 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:48,136 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:50,193 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:52,853 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:55,397 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:59,553 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:20:59,736 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:21:07,545 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-30 20:21:32,856 WARN L178 SmtUtils]: Spent 1.25 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-09-30 20:21:33,703 WARN L178 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-09-30 20:21:34,724 WARN L178 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-09-30 20:22:48,493 WARN L178 SmtUtils]: Spent 1.23 m on a formula simplification. DAG size of input: 1932 DAG size of output: 362 Received shutdown request... [2018-09-30 20:22:52,095 WARN L186 SmtUtils]: Removed 2 from assertion stack [2018-09-30 20:22:52,095 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-09-30 20:22:52,097 INFO L168 Benchmark]: Toolchain (without parser) took 254535.57 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 251.0 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-09-30 20:22:52,099 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:22:52,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:22:52,102 INFO L168 Benchmark]: Boogie Preprocessor took 19.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:22:52,102 INFO L168 Benchmark]: RCFGBuilder took 347.46 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:22:52,106 INFO L168 Benchmark]: TraceAbstraction took 254123.50 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 229.8 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-09-30 20:22:52,114 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 0.21 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 38.92 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 19.83 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 347.46 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 254123.50 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 229.8 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 1932. RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-22-52-131.csv Completed graceful shutdown