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_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.c_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 00:53:52,902 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 00:53:52,904 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 00:53:52,920 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-01 00:53:52,956 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-01 00:53:52,971 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 00:53:52,972 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 00:53:52,972 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 00:53:52,973 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 00:53:52,973 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 00:53:52,973 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 00:53:52,974 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 00:53:52,974 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 00:53:52,974 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 00:53:52,974 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 00:53:52,974 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 00:53:52,975 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 00:53:52,975 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 00:53:52,975 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 00:53:52,975 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 00:53:52,975 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 00:53:52,976 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 00:53:52,976 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 00:53:52,976 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 00:53:52,976 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 00:53:52,978 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 00:53:52,978 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 00:53:52,979 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:53:52,979 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 00:53:52,979 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 00:53:52,979 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 00:53:52,979 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 00:53:52,979 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 00:53:52,980 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 00:53:52,980 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 00:53:52,980 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-01 00:53:53,051 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 00:53:53,066 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 00:53:53,069 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 00:53:53,071 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 00:53:53,071 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 00:53:53,072 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.c_4.bpl [2018-10-01 00:53:53,072 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.c_4.bpl' [2018-10-01 00:53:53,123 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 00:53:53,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 00:53:53,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 00:53:53,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 00:53:53,127 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 00:53:53,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:53:53" (1/1) ... [2018-10-01 00:53:53,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:53:53" (1/1) ... [2018-10-01 00:53:53,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 00:53:53,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 00:53:53,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 00:53:53,170 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 00:53:53,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:53:53" (1/1) ... [2018-10-01 00:53:53,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:53:53" (1/1) ... [2018-10-01 00:53:53,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:53:53" (1/1) ... [2018-10-01 00:53:53,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:53:53" (1/1) ... [2018-10-01 00:53:53,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:53:53" (1/1) ... [2018-10-01 00:53:53,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:53:53" (1/1) ... [2018-10-01 00:53:53,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:53:53" (1/1) ... [2018-10-01 00:53:53,193 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 00:53:53,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 00:53:53,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 00:53:53,194 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 00:53:53,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:53:53" (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 [2018-10-01 00:53:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-01 00:53:53,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-01 00:53:53,502 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-01 00:53:53,502 INFO L202 PluginConnector]: Adding new model nested.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:53:53 BoogieIcfgContainer [2018-10-01 00:53:53,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 00:53:53,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 00:53:53,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 00:53:53,507 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 00:53:53,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:53:53" (1/2) ... [2018-10-01 00:53:53,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b299bb and model type nested.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 12:53:53, skipping insertion in model container [2018-10-01 00:53:53,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:53:53" (2/2) ... [2018-10-01 00:53:53,510 INFO L112 eAbstractionObserver]: Analyzing ICFG nested.c_4.bpl [2018-10-01 00:53:53,520 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 00:53:53,528 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-01 00:53:53,578 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 00:53:53,579 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 00:53:53,580 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 00:53:53,580 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 00:53:53,580 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 00:53:53,580 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 00:53:53,583 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 00:53:53,583 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 00:53:53,583 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 00:53:53,599 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-01 00:53:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-01 00:53:53,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:53:53,608 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-01 00:53:53,609 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:53:53,624 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:53:53,624 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-01 00:53:53,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:53:53,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:53:53,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:53,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:53:53,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:53:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:53,770 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:53:53,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-01 00:53:53,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-01 00:53:53,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-01 00:53:53,786 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:53:53,788 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-01 00:53:53,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:53:53,905 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-01 00:53:53,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-01 00:53:53,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-01 00:53:53,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:53:53,919 INFO L225 Difference]: With dead ends: 11 [2018-10-01 00:53:53,919 INFO L226 Difference]: Without dead ends: 7 [2018-10-01 00:53:53,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 00:53:53,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-01 00:53:53,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-01 00:53:53,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-01 00:53:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-01 00:53:53,973 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-01 00:53:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:53:53,973 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-01 00:53:53,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-01 00:53:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-01 00:53:53,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-01 00:53:53,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:53:53,974 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-01 00:53:53,974 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:53:53,975 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:53:53,975 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-01 00:53:53,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:53:53,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:53:53,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:53,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:53:53,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:53:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:54,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:53:54,065 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) [2018-10-01 00:53:54,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:53:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:53:54,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:53:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:54,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:53:54,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-01 00:53:54,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 00:53:54,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 00:53:54,191 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:53:54,191 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-01 00:53:54,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:53:54,254 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-01 00:53:54,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 00:53:54,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-01 00:53:54,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:53:54,256 INFO L225 Difference]: With dead ends: 11 [2018-10-01 00:53:54,256 INFO L226 Difference]: Without dead ends: 9 [2018-10-01 00:53:54,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 00:53:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-01 00:53:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-01 00:53:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-01 00:53:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-01 00:53:54,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-01 00:53:54,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:53:54,261 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-01 00:53:54,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 00:53:54,261 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-01 00:53:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 00:53:54,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:53:54,262 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-01 00:53:54,263 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:53:54,263 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:53:54,263 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-01 00:53:54,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:53:54,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:53:54,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:54,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:53:54,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:53:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:54,395 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:53:54,395 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 [2018-10-01 00:53:54,408 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:53:54,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:53:54,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:53:54,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:53:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:53:54,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:53:54,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2018-10-01 00:53:54,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 00:53:54,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 00:53:54,505 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:53:54,505 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-10-01 00:53:54,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:53:54,717 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-01 00:53:54,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 00:53:54,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2018-10-01 00:53:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:53:54,718 INFO L225 Difference]: With dead ends: 9 [2018-10-01 00:53:54,718 INFO L226 Difference]: Without dead ends: 0 [2018-10-01 00:53:54,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:53:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-01 00:53:54,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-01 00:53:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-01 00:53:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-01 00:53:54,719 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2018-10-01 00:53:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:53:54,720 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-01 00:53:54,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 00:53:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-01 00:53:54,720 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-01 00:53:54,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-01 00:53:54,934 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-01 00:53:55,068 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-01 00:53:55,071 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(lines 3 64) no Hoare annotation was computed. [2018-10-01 00:53:55,071 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(lines 3 64) no Hoare annotation was computed. [2018-10-01 00:53:55,072 INFO L422 ceAbstractionStarter]: At program point L61(lines 36 61) the Hoare annotation is: (or (and (<= ~last 0) (<= ULTIMATE.start_main_~c~5 1)) (and (<= 1 ULTIMATE.start_main_~st~5) (<= ULTIMATE.start_main_~c~5 0))) [2018-10-01 00:53:55,072 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(lines 3 64) no Hoare annotation was computed. [2018-10-01 00:53:55,072 INFO L422 ceAbstractionStarter]: At program point L53(lines 53 62) the Hoare annotation is: false [2018-10-01 00:53:55,073 INFO L426 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONASSERT(line 63) no Hoare annotation was computed. [2018-10-01 00:53:55,073 INFO L422 ceAbstractionStarter]: At program point L39(lines 39 54) the Hoare annotation is: (or (and (<= ~last 0) (<= ULTIMATE.start_main_~c~5 1)) (and (<= 1 ULTIMATE.start_main_~st~5) (<= ULTIMATE.start_main_~c~5 0))) [2018-10-01 00:53:55,083 INFO L202 PluginConnector]: Adding new model nested.c_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:53:55 BoogieIcfgContainer [2018-10-01 00:53:55,084 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:53:55,085 INFO L168 Benchmark]: Toolchain (without parser) took 1961.37 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 87.2 MB). Peak memory consumption was 87.2 MB. Max. memory is 7.1 GB. [2018-10-01 00:53:55,086 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 00:53:55,087 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.17 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. [2018-10-01 00:53:55,088 INFO L168 Benchmark]: Boogie Preprocessor took 23.97 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. [2018-10-01 00:53:55,089 INFO L168 Benchmark]: RCFGBuilder took 308.72 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:53:55,090 INFO L168 Benchmark]: TraceAbstraction took 1580.42 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 66.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:53:55,095 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.97 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 308.72 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1580.42 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 66.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 63]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: false - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (~last <= 0 && main_~c~5 <= 1) || (1 <= main_~st~5 && main_~c~5 <= 0) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (~last <= 0 && main_~c~5 <= 1) || (1 <= main_~st~5 && main_~c~5 <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. SAFE Result, 1.5s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.3s HoareAnnotationTime, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 8 SDs, 0 SdLazy, 12 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 5 NumberOfFragments, 31 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 417 SizeOfPredicates, 3 NumberOfNonLiveVariables, 92 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 2/16 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested.c_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-53-55-109.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested.c_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-53-55-109.csv Received shutdown request...