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 0.1.23-133090d [2018-10-04 09:20:28,564 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:20:28,566 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:20:28,577 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:20:28,578 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:20:28,579 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:20:28,580 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:20:28,582 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:20:28,583 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:20:28,584 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:20:28,585 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:20:28,585 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:20:28,586 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:20:28,587 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:20:28,589 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:20:28,589 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:20:28,590 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:20:28,592 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:20:28,594 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:20:28,596 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:20:28,597 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:20:28,598 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:20:28,601 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 09:20:28,609 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-04 09:20:28,630 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:20:28,630 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:20:28,631 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:20:28,631 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:20:28,632 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:20:28,632 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:20:28,633 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:20:28,633 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:20:28,633 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:20:28,633 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:20:28,633 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:20:28,634 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:20:28,634 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:20:28,634 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:20:28,634 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:20:28,634 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:20:28,635 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:20:28,635 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:20:28,635 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:20:28,635 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:20:28,635 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:20:28,636 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:20:28,636 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:20:28,636 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:20:28,636 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:20:28,636 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:20:28,637 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:20:28,637 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:20:28,637 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:20:28,637 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:20:28,682 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:20:28,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:20:28,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:20:28,707 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:20:28,707 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:20:28,708 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl [2018-10-04 09:20:28,708 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl' [2018-10-04 09:20:28,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:20:28,769 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:20:28,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:20:28,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:20:28,770 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:20:28,791 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 04.10 09:20:28" (1/1) ... [2018-10-04 09:20:28,803 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 04.10 09:20:28" (1/1) ... [2018-10-04 09:20:28,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:20:28,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:20:28,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:20:28,812 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:20:28,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:20:28" (1/1) ... [2018-10-04 09:20:28,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:20:28" (1/1) ... [2018-10-04 09:20:28,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:20:28" (1/1) ... [2018-10-04 09:20:28,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:20:28" (1/1) ... [2018-10-04 09:20:28,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:20:28" (1/1) ... [2018-10-04 09:20:28,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:20:28" (1/1) ... [2018-10-04 09:20:28,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:20:28" (1/1) ... [2018-10-04 09:20:28,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:20:28,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:20:28,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:20:28,833 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:20:28,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:20:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:20:28,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 09:20:28,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 09:20:29,135 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 09:20:29,136 INFO L202 PluginConnector]: Adding new model nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:20:29 BoogieIcfgContainer [2018-10-04 09:20:29,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:20:29,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:20:29,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:20:29,143 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:20:29,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:20:28" (1/2) ... [2018-10-04 09:20:29,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36dfba1f and model type nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:20:29, skipping insertion in model container [2018-10-04 09:20:29,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:20:29" (2/2) ... [2018-10-04 09:20:29,147 INFO L112 eAbstractionObserver]: Analyzing ICFG nested.i_4.bpl [2018-10-04 09:20:29,156 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:20:29,164 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:20:29,214 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:20:29,215 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:20:29,215 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:20:29,216 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:20:29,216 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:20:29,216 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:20:29,216 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:20:29,217 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:20:29,217 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:20:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 09:20:29,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:20:29,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:29,240 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 09:20:29,242 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:29,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:29,248 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 09:20:29,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:29,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:29,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:29,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:20:29,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:20:29,393 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:20:29,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:20:29,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:20:29,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:20:29,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 09:20:29,412 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 09:20:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:29,472 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-04 09:20:29,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:20:29,475 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 09:20:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:29,485 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:20:29,485 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:20:29,489 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 [2018-10-04 09:20:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:20:29,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-10-04 09:20:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 09:20:29,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 09:20:29,528 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-10-04 09:20:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:29,528 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 09:20:29,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:20:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 09:20:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:20:29,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:29,530 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 09:20:29,530 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:29,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:29,530 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-10-04 09:20:29,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:29,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:29,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:29,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:20:29,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:20:29,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:20:29,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 09:20:29,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:20:29,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:20:29,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 09:20:29,644 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-10-04 09:20:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:29,784 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-10-04 09:20:29,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:20:29,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 09:20:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:29,786 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:20:29,786 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:20:29,787 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 [2018-10-04 09:20:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:20:29,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:20:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:20:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 09:20:29,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-04 09:20:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:29,793 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 09:20:29,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:20:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 09:20:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:20:29,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:29,795 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 09:20:29,795 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:29,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-10-04 09:20:29,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:29,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:29,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:29,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:20:29,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:20:29,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:29,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:29,925 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:20:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:29,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:20:30,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:30,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-04 09:20:30,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:20:30,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:20:30,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:20:30,329 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-10-04 09:20:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:30,441 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-04 09:20:30,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:20:30,442 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-10-04 09:20:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:30,442 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:20:30,442 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:20:30,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-04 09:20:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:20:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:20:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:20:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-04 09:20:30,448 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-04 09:20:30,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:30,449 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-04 09:20:30,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:20:30,449 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-04 09:20:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:20:30,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:30,450 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 09:20:30,450 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:30,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:30,451 INFO L82 PathProgramCache]: Analyzing trace with hash -928778543, now seen corresponding path program 2 times [2018-10-04 09:20:30,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:30,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:30,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:30,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:20:30,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:20:30,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:30,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:30,648 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:20:30,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:20:30,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:30,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-04 09:20:30,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:30,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2018-10-04 09:20:30,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:20:30,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:20:30,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-04 09:20:30,785 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-04 09:20:30,952 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-04 09:20:31,196 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-04 09:20:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:31,427 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2018-10-04 09:20:31,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:20:31,427 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-04 09:20:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:31,429 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:20:31,429 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:20:31,432 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 [2018-10-04 09:20:31,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:20:31,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2018-10-04 09:20:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:20:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-04 09:20:31,440 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2018-10-04 09:20:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:31,441 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-04 09:20:31,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:20:31,441 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-04 09:20:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:20:31,442 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:31,442 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 3, 2, 2, 1, 1, 1] [2018-10-04 09:20:31,443 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:31,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:31,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1778757007, now seen corresponding path program 3 times [2018-10-04 09:20:31,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:31,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:31,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:31,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:20:31,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-04 09:20:31,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:31,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:31,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:20:31,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 09:20:31,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:31,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-04 09:20:31,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:31,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2018-10-04 09:20:31,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:20:31,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:20:31,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-04 09:20:32,000 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-10-04 09:20:32,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:32,570 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2018-10-04 09:20:32,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:20:32,571 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-10-04 09:20:32,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:32,572 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:20:32,572 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:20:32,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2018-10-04 09:20:32,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:20:32,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-10-04 09:20:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:20:32,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-10-04 09:20:32,585 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 24 [2018-10-04 09:20:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:32,585 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-10-04 09:20:32,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:20:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-10-04 09:20:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:20:32,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:32,587 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-10-04 09:20:32,588 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:32,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:32,588 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-10-04 09:20:32,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:32,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:32,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:32,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:20:32,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-04 09:20:32,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:32,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:32,737 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:20:32,769 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:20:32,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:32,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-04 09:20:32,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:32,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-10-04 09:20:32,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:20:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:20:32,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-10-04 09:20:32,942 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2018-10-04 09:20:32,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:32,992 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2018-10-04 09:20:32,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:20:32,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2018-10-04 09:20:32,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:32,996 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:20:32,996 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:20:32,997 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 [2018-10-04 09:20:32,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:20:33,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:20:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:20:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-10-04 09:20:33,010 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2018-10-04 09:20:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:33,011 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-10-04 09:20:33,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:20:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-10-04 09:20:33,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:20:33,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:33,012 INFO L375 BasicCegarLoop]: trace histogram [18, 15, 4, 3, 3, 1, 1, 1] [2018-10-04 09:20:33,013 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:33,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:33,013 INFO L82 PathProgramCache]: Analyzing trace with hash -254509681, now seen corresponding path program 5 times [2018-10-04 09:20:33,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:33,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:33,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:33,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:20:33,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-10-04 09:20:33,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:33,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:33,253 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:20:33,311 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-04 09:20:33,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:33,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-10-04 09:20:33,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:33,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-10-04 09:20:33,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:20:33,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:20:33,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:20:33,564 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2018-10-04 09:20:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:33,612 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2018-10-04 09:20:33,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:20:33,613 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2018-10-04 09:20:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:33,614 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:20:33,614 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:20:33,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-10-04 09:20:33,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:20:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 09:20:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 09:20:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2018-10-04 09:20:33,628 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2018-10-04 09:20:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:33,629 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2018-10-04 09:20:33,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:20:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2018-10-04 09:20:33,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:20:33,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:33,631 INFO L375 BasicCegarLoop]: trace histogram [21, 18, 4, 3, 3, 1, 1, 1] [2018-10-04 09:20:33,631 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:33,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:33,631 INFO L82 PathProgramCache]: Analyzing trace with hash -996261859, now seen corresponding path program 6 times [2018-10-04 09:20:33,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:33,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:33,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:33,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:20:33,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 202 proven. 42 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-10-04 09:20:33,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:33,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:33,780 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:20:33,809 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 09:20:33,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:33,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-04 09:20:33,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:33,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2018-10-04 09:20:33,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:20:33,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:20:33,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:20:33,944 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 14 states. [2018-10-04 09:20:34,419 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-04 09:20:34,751 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-04 09:20:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:35,789 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2018-10-04 09:20:35,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:20:35,790 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2018-10-04 09:20:35,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:35,791 INFO L225 Difference]: With dead ends: 129 [2018-10-04 09:20:35,791 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 09:20:35,793 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 [2018-10-04 09:20:35,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 09:20:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2018-10-04 09:20:35,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 09:20:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2018-10-04 09:20:35,816 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 52 [2018-10-04 09:20:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:35,816 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2018-10-04 09:20:35,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:20:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2018-10-04 09:20:35,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 09:20:35,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:35,818 INFO L375 BasicCegarLoop]: trace histogram [32, 28, 5, 4, 4, 1, 1, 1] [2018-10-04 09:20:35,818 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:35,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:35,819 INFO L82 PathProgramCache]: Analyzing trace with hash -252111625, now seen corresponding path program 7 times [2018-10-04 09:20:35,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:35,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:35,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:35,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:20:35,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-10-04 09:20:36,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:36,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:36,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:20:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:36,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-10-04 09:20:36,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:36,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-10-04 09:20:36,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:20:36,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:20:36,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:20:36,736 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 19 states. [2018-10-04 09:20:36,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:36,786 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2018-10-04 09:20:36,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:20:36,787 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2018-10-04 09:20:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:36,788 INFO L225 Difference]: With dead ends: 143 [2018-10-04 09:20:36,788 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 09:20:36,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2018-10-04 09:20:36,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 09:20:36,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 09:20:36,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 09:20:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2018-10-04 09:20:36,808 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2018-10-04 09:20:36,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:36,809 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2018-10-04 09:20:36,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:20:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2018-10-04 09:20:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 09:20:36,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:36,811 INFO L375 BasicCegarLoop]: trace histogram [36, 32, 5, 4, 4, 1, 1, 1] [2018-10-04 09:20:36,811 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:36,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:36,811 INFO L82 PathProgramCache]: Analyzing trace with hash 771511391, now seen corresponding path program 8 times [2018-10-04 09:20:36,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:36,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:36,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:36,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:20:36,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-10-04 09:20:37,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:37,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:37,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:20:37,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:20:37,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:37,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-10-04 09:20:37,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:37,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-10-04 09:20:37,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:20:37,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:20:37,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:20:37,312 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 21 states. [2018-10-04 09:20:37,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:37,380 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2018-10-04 09:20:37,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:20:37,381 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2018-10-04 09:20:37,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:37,382 INFO L225 Difference]: With dead ends: 157 [2018-10-04 09:20:37,382 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 09:20:37,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-10-04 09:20:37,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 09:20:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 09:20:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 09:20:37,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2018-10-04 09:20:37,411 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2018-10-04 09:20:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:37,411 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2018-10-04 09:20:37,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:20:37,412 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2018-10-04 09:20:37,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:20:37,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:37,417 INFO L375 BasicCegarLoop]: trace histogram [40, 36, 5, 4, 4, 1, 1, 1] [2018-10-04 09:20:37,417 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:37,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:37,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1630563271, now seen corresponding path program 9 times [2018-10-04 09:20:37,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:37,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:37,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:37,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:20:37,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-10-04 09:20:37,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:37,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:37,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:20:37,731 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 09:20:37,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:37,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-10-04 09:20:38,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:38,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-10-04 09:20:38,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:20:38,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:20:38,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-04 09:20:38,115 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 23 states. [2018-10-04 09:20:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:38,177 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2018-10-04 09:20:38,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:20:38,178 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2018-10-04 09:20:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:38,179 INFO L225 Difference]: With dead ends: 171 [2018-10-04 09:20:38,179 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 09:20:38,180 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 [2018-10-04 09:20:38,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 09:20:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 09:20:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:20:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2018-10-04 09:20:38,200 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2018-10-04 09:20:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:38,200 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2018-10-04 09:20:38,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:20:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2018-10-04 09:20:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 09:20:38,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:38,202 INFO L375 BasicCegarLoop]: trace histogram [44, 40, 5, 4, 4, 1, 1, 1] [2018-10-04 09:20:38,202 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:38,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:38,202 INFO L82 PathProgramCache]: Analyzing trace with hash -220374225, now seen corresponding path program 10 times [2018-10-04 09:20:38,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:38,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:38,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:38,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:20:38,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-04 09:20:38,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:38,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:38,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:20:38,633 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:20:38,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:38,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-04 09:20:38,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:38,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-04 09:20:38,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:20:38,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:20:38,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-04 09:20:38,765 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 12 states. [2018-10-04 09:20:38,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:38,927 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-10-04 09:20:38,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:20:38,928 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2018-10-04 09:20:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:38,929 INFO L225 Difference]: With dead ends: 149 [2018-10-04 09:20:38,930 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 09:20:38,930 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 [2018-10-04 09:20:38,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 09:20:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 125. [2018-10-04 09:20:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 09:20:38,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2018-10-04 09:20:38,953 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 100 [2018-10-04 09:20:38,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:38,954 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2018-10-04 09:20:38,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:20:38,954 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2018-10-04 09:20:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 09:20:38,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:38,956 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 6, 5, 5, 1, 1, 1] [2018-10-04 09:20:38,956 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:38,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:38,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1446024969, now seen corresponding path program 11 times [2018-10-04 09:20:38,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:38,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:38,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:38,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:20:38,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-04 09:20:39,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:39,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:39,390 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:20:39,468 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 09:20:39,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:39,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-04 09:20:39,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:39,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-04 09:20:39,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:20:39,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:20:39,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-04 09:20:39,654 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand 14 states. [2018-10-04 09:20:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:39,867 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2018-10-04 09:20:39,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:20:39,867 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2018-10-04 09:20:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:39,869 INFO L225 Difference]: With dead ends: 173 [2018-10-04 09:20:39,870 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 09:20:39,871 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 [2018-10-04 09:20:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 09:20:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 149. [2018-10-04 09:20:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 09:20:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2018-10-04 09:20:39,903 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 124 [2018-10-04 09:20:39,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:39,904 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2018-10-04 09:20:39,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:20:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2018-10-04 09:20:39,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 09:20:39,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:39,906 INFO L375 BasicCegarLoop]: trace histogram [66, 60, 7, 6, 6, 1, 1, 1] [2018-10-04 09:20:39,906 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:39,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:39,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1667523811, now seen corresponding path program 12 times [2018-10-04 09:20:39,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:39,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:39,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:39,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:20:39,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-04 09:20:40,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:40,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:40,165 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:20:40,281 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 09:20:40,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:40,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-04 09:20:40,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:40,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-10-04 09:20:40,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:20:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:20:40,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-04 09:20:40,481 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand 16 states. [2018-10-04 09:20:40,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:40,577 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2018-10-04 09:20:40,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:20:40,577 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 148 [2018-10-04 09:20:40,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:40,579 INFO L225 Difference]: With dead ends: 197 [2018-10-04 09:20:40,579 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 09:20:40,579 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 [2018-10-04 09:20:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 09:20:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2018-10-04 09:20:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 09:20:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 180 transitions. [2018-10-04 09:20:40,612 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 180 transitions. Word has length 148 [2018-10-04 09:20:40,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:40,612 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 180 transitions. [2018-10-04 09:20:40,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:20:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 180 transitions. [2018-10-04 09:20:40,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 09:20:40,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:40,614 INFO L375 BasicCegarLoop]: trace histogram [77, 70, 8, 7, 7, 1, 1, 1] [2018-10-04 09:20:40,615 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:40,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:40,615 INFO L82 PathProgramCache]: Analyzing trace with hash 107136189, now seen corresponding path program 13 times [2018-10-04 09:20:40,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:40,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:40,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:40,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:20:40,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-04 09:20:40,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:40,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:40,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:20:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:40,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-04 09:20:41,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:41,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-04 09:20:41,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:20:41,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:20:41,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-04 09:20:41,207 INFO L87 Difference]: Start difference. First operand 173 states and 180 transitions. Second operand 18 states. [2018-10-04 09:20:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:41,298 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2018-10-04 09:20:41,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:20:41,299 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 172 [2018-10-04 09:20:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:41,300 INFO L225 Difference]: With dead ends: 221 [2018-10-04 09:20:41,300 INFO L226 Difference]: Without dead ends: 219 [2018-10-04 09:20:41,300 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 [2018-10-04 09:20:41,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-04 09:20:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 197. [2018-10-04 09:20:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-04 09:20:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 205 transitions. [2018-10-04 09:20:41,333 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 205 transitions. Word has length 172 [2018-10-04 09:20:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:41,333 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 205 transitions. [2018-10-04 09:20:41,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:20:41,334 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 205 transitions. [2018-10-04 09:20:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-04 09:20:41,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:41,336 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 9, 8, 8, 1, 1, 1] [2018-10-04 09:20:41,336 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:41,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1927956841, now seen corresponding path program 14 times [2018-10-04 09:20:41,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:41,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:41,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:41,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:20:41,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-04 09:20:42,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:42,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:42,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:20:42,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:20:42,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:42,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-04 09:20:42,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:42,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-04 09:20:42,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:20:42,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:20:42,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-04 09:20:42,414 INFO L87 Difference]: Start difference. First operand 197 states and 205 transitions. Second operand 20 states. [2018-10-04 09:20:42,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:42,550 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2018-10-04 09:20:42,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:20:42,551 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 196 [2018-10-04 09:20:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:42,552 INFO L225 Difference]: With dead ends: 245 [2018-10-04 09:20:42,552 INFO L226 Difference]: Without dead ends: 243 [2018-10-04 09:20:42,553 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 [2018-10-04 09:20:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-04 09:20:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2018-10-04 09:20:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-04 09:20:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2018-10-04 09:20:42,590 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 196 [2018-10-04 09:20:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:42,591 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2018-10-04 09:20:42,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:20:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2018-10-04 09:20:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-04 09:20:42,593 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:42,594 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 10, 9, 9, 1, 1, 1] [2018-10-04 09:20:42,594 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:42,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:42,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1486407055, now seen corresponding path program 15 times [2018-10-04 09:20:42,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:42,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:42,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:42,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:20:42,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-04 09:20:43,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:20:43,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:20:43,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:20:43,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2018-10-04 09:20:43,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:20:43,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:20:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-04 09:20:43,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:20:43,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-04 09:20:43,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:20:43,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:20:43,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:20:43,490 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand 22 states. [2018-10-04 09:20:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:43,802 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2018-10-04 09:20:43,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:20:43,802 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 220 [2018-10-04 09:20:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:43,804 INFO L225 Difference]: With dead ends: 269 [2018-10-04 09:20:43,804 INFO L226 Difference]: Without dead ends: 267 [2018-10-04 09:20:43,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-04 09:20:43,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-04 09:20:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 245. [2018-10-04 09:20:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-04 09:20:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 255 transitions. [2018-10-04 09:20:43,852 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 255 transitions. Word has length 220 [2018-10-04 09:20:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:43,852 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 255 transitions. [2018-10-04 09:20:43,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:20:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 255 transitions. [2018-10-04 09:20:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-04 09:20:43,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:20:43,854 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 11, 10, 10, 1, 1, 1] [2018-10-04 09:20:43,854 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:20:43,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 09:20:43,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1732333643, now seen corresponding path program 16 times [2018-10-04 09:20:43,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:20:43,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:20:43,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:43,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:20:43,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:20:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:20:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 12082 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 09:20:49,412 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:20:49,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-10-04 09:20:49,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 09:20:49,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 09:20:49,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 09:20:49,417 INFO L87 Difference]: Start difference. First operand 245 states and 255 transitions. Second operand 103 states. [2018-10-04 09:20:52,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:20:52,351 INFO L93 Difference]: Finished difference Result 10235 states and 10695 transitions. [2018-10-04 09:20:52,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 09:20:52,352 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 244 [2018-10-04 09:20:52,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:20:52,353 INFO L225 Difference]: With dead ends: 10235 [2018-10-04 09:20:52,353 INFO L226 Difference]: Without dead ends: 0 [2018-10-04 09:20:52,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 09:20:52,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-04 09:20:52,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-04 09:20:52,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-04 09:20:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-04 09:20:52,370 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 244 [2018-10-04 09:20:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:20:52,370 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-04 09:20:52,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 09:20:52,370 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-04 09:20:52,370 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-04 09:20:52,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-04 09:20:58,951 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:20:58,953 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:20:58,962 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:20:59,098 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:20:59,176 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:20:59,219 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:20:59,307 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:20:59,338 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:20:59,487 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:20:59,548 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:20:59,744 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:20:59,811 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:00,104 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:00,147 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:00,443 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:00,509 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:00,668 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:00,778 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:00,881 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:01,120 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:01,186 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:01,696 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:01,784 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:01,876 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:02,102 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:02,428 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:02,929 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:03,303 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:03,561 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:03,719 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:03,862 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:04,022 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:04,813 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:04,928 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:05,225 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:05,335 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:05,931 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:06,133 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:06,237 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:06,705 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:06,880 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:07,043 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:07,168 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:07,646 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:07,768 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:07,806 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:07,903 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:07,943 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:08,041 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:08,171 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:09,320 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:09,331 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:09,778 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:10,380 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:10,845 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:11,279 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:11,736 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:13,925 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:15,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:15,939 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:16,532 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:16,545 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:19,166 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:20,441 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:20,624 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:21,163 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:22,019 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:24,233 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:25,876 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:28,276 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:30,593 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:34,143 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:34,304 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:21:41,354 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:03,370 WARN L178 SmtUtils]: Spent 1.18 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-10-04 09:22:08,262 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,263 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,267 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,334 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,378 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,402 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,457 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,476 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,570 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,609 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,738 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,780 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,955 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:08,986 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:09,105 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:09,165 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:09,309 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:09,570 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:09,665 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:09,886 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:09,959 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:10,599 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:10,714 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:10,828 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:11,110 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:11,430 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:11,867 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:12,284 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:12,566 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:12,755 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:12,915 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:13,091 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:14,015 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:14,142 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:14,432 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:14,554 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:15,186 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:15,415 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:15,525 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:15,968 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:16,108 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:16,239 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:16,269 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:16,789 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:16,922 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:16,964 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:17,189 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:17,230 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:17,332 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:17,471 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:18,701 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:18,713 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:19,068 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:19,705 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:20,199 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:20,680 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:21,300 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:23,309 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:25,440 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:25,621 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:26,132 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:26,146 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:29,149 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:30,274 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:30,474 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:31,082 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:32,113 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:34,364 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:36,233 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:38,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:41,298 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:45,264 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:45,433 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:22:53,227 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 09:23:16,569 WARN L178 SmtUtils]: Spent 1.22 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-10-04 09:23:17,375 WARN L178 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-04 09:23:18,282 WARN L178 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-04 09:24:31,606 WARN L178 SmtUtils]: Spent 1.22 m on a formula simplification. DAG size of input: 1932 DAG size of output: 362 Received shutdown request... [2018-10-04 09:24:45,072 WARN L186 SmtUtils]: Removed 1022 from assertion stack [2018-10-04 09:24:45,072 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-10-04 09:24:45,073 INFO L168 Benchmark]: Toolchain (without parser) took 256305.00 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.6 GB). Free memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: -847.4 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-10-04 09:24:45,074 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:24:45,074 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.84 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:24:45,075 INFO L168 Benchmark]: Boogie Preprocessor took 21.48 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:24:45,075 INFO L168 Benchmark]: RCFGBuilder took 303.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:24:45,076 INFO L168 Benchmark]: TraceAbstraction took 255932.84 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.6 GB). Free memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: -868.5 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-10-04 09:24:45,080 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.84 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 21.48 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 303.22 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 255932.84 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.6 GB). Free memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: -868.5 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-0-2018-10-04_09-24-45-099.csv Completed graceful shutdown