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/num_conversion_1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:53:22,704 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:53:22,706 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:53:22,719 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:53:22,720 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:53:22,721 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:53:22,722 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:53:22,724 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:53:22,727 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:53:22,728 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:53:22,729 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:53:22,753 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 [2018-09-30 10:53:22,768 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:53:22,769 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:53:22,769 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:53:22,770 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:53:22,770 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:53:22,770 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:53:22,771 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:53:22,771 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:53:22,771 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:53:22,771 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:53:22,771 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:53:22,772 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:53:22,772 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:53:22,772 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:53:22,772 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:53:22,772 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:53:22,773 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:53:22,773 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:53:22,773 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:53:22,773 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:53:22,773 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:53:22,773 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:53:22,774 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:53:22,774 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:53:22,774 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:53:22,774 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:53:22,774 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:53:22,775 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:53:22,775 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:53:22,775 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:53:22,775 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 10:53:22,818 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:53:22,831 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:53:22,834 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:53:22,836 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:53:22,837 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:53:22,837 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/num_conversion_1.i_3.bpl [2018-09-30 10:53:22,838 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/num_conversion_1.i_3.bpl' [2018-09-30 10:53:22,884 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:53:22,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:53:22,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:53:22,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:53:22,889 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:53:22,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:53:22" (1/1) ... [2018-09-30 10:53:22,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:53:22" (1/1) ... [2018-09-30 10:53:22,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:53:22,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:53:22,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:53:22,929 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:53:22,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:53:22" (1/1) ... [2018-09-30 10:53:22,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:53:22" (1/1) ... [2018-09-30 10:53:22,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:53:22" (1/1) ... [2018-09-30 10:53:22,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:53:22" (1/1) ... [2018-09-30 10:53:22,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:53:22" (1/1) ... [2018-09-30 10:53:22,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:53:22" (1/1) ... [2018-09-30 10:53:22,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:53:22" (1/1) ... [2018-09-30 10:53:22,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:53:22,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:53:22,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:53:22,950 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:53:22,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:53:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:53:23,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:53:23,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:53:23,291 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:53:23,292 INFO L202 PluginConnector]: Adding new model num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:53:23 BoogieIcfgContainer [2018-09-30 10:53:23,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:53:23,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:53:23,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:53:23,300 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:53:23,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:53:22" (1/2) ... [2018-09-30 10:53:23,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df15bb8 and model type num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:53:23, skipping insertion in model container [2018-09-30 10:53:23,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "num_conversion_1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:53:23" (2/2) ... [2018-09-30 10:53:23,304 INFO L112 eAbstractionObserver]: Analyzing ICFG num_conversion_1.i_3.bpl [2018-09-30 10:53:23,315 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:53:23,327 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:53:23,387 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:53:23,388 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:53:23,388 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:53:23,389 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:53:23,389 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:53:23,389 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:53:23,389 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:53:23,392 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:53:23,392 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:53:23,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 10:53:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:53:23,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:23,432 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 10:53:23,434 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:23,443 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:23,443 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 10:53:23,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:23,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:23,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:23,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:53:23,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:23,626 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:53:23,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:53:23,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:53:23,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:53:23,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:23,645 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 10:53:23,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:23,835 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 10:53:23,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:53:23,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 10:53:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:23,853 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:53:23,853 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:53:23,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:53:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:53:23,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:53:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:53:23,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 10:53:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:23,894 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:53:23,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:53:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:53:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:53:23,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:23,895 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 10:53:23,896 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:23,896 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:23,896 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 10:53:23,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:23,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:23,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:23,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:53:23,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:24,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:24,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:24,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:53:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:24,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:24,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:24,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-30 10:53:24,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:53:24,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:53:24,196 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:24,196 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2018-09-30 10:53:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:24,442 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:53:24,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:53:24,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2018-09-30 10:53:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:24,445 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:53:24,445 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:53:24,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:53:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:53:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:53:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:53:24,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 10:53:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:24,450 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:53:24,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:53:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:53:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:53:24,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:24,451 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 10:53:24,451 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:24,452 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:24,452 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 10:53:24,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:24,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:24,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:24,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:53:24,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:24,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:24,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:24,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:53:24,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:53:24,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:24,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:25,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:25,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-09-30 10:53:25,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:53:25,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:53:25,009 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:25,009 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2018-09-30 10:53:25,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:25,390 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:53:25,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:53:25,391 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2018-09-30 10:53:25,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:25,392 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:53:25,393 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:53:25,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:25,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:53:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:53:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:53:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:53:25,399 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 10:53:25,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:25,400 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:53:25,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:53:25,400 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:53:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:53:25,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:25,401 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 10:53:25,401 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:25,401 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:25,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 10:53:25,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:25,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:25,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:25,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:25,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:25,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:25,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:25,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:53:25,581 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 10:53:25,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:25,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:25,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:25,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-09-30 10:53:25,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:53:25,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:53:25,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:25,820 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2018-09-30 10:53:28,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:28,505 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:53:28,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:53:28,505 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-09-30 10:53:28,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:28,507 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:53:28,507 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:53:28,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:53:28,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:53:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:53:28,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:53:28,513 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 10:53:28,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:28,513 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:53:28,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:53:28,513 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:53:28,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:53:28,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:28,514 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 10:53:28,514 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:28,514 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:28,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 10:53:28,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:28,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:28,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:28,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:28,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:28,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:28,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:28,694 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:53:28,710 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:53:28,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:28,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:30,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:30,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-09-30 10:53:30,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:53:30,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:53:30,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:30,244 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 11 states. [2018-09-30 10:53:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:31,121 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:53:31,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:53:31,122 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2018-09-30 10:53:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:31,122 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:53:31,122 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:53:31,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:53:31,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:53:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:53:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:53:31,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 10:53:31,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:31,130 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:53:31,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:53:31,130 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:53:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:53:31,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:31,131 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 10:53:31,131 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:31,131 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:31,132 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 10:53:31,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:31,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:31,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:31,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:31,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:31,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:31,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:31,331 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:53:31,353 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 10:53:31,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:31,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:32,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:32,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-09-30 10:53:32,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:53:32,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:53:32,456 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:32,456 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2018-09-30 10:53:33,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:33,073 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:53:33,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:53:33,074 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2018-09-30 10:53:33,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:33,075 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:53:33,075 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:53:33,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:53:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:53:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:53:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:53:33,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 10:53:33,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:33,086 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:53:33,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:53:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:53:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:53:33,087 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:33,087 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 10:53:33,087 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:33,087 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:33,088 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 10:53:33,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:33,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:33,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:33,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:33,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:33,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:33,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:33,378 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:53:33,406 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:53:33,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:53:33,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:35,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:53:35,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-09-30 10:53:35,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:53:35,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:53:35,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 10:53:35,838 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 15 states. [2018-09-30 10:53:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:53:37,173 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:53:37,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:53:37,174 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-09-30 10:53:37,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:53:37,175 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:53:37,175 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:53:37,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 10:53:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:53:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:53:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:53:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:53:37,184 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 10:53:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:53:37,185 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:53:37,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:53:37,185 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:53:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:53:37,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:53:37,186 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 10:53:37,186 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:53:37,186 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 10:53:37,186 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 10:53:37,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:53:37,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:53:37,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:37,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:53:37,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:53:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:53:37,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:53:37,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:37,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:53:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:53:37,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:53:40,098 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:53:40,100 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Cannot handle case were solver cannot decide implication of predicates at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.biesenb.ImplicationGraph.internImplication(ImplicationGraph.java:316) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.biesenb.ImplicationGraph.unifyPredicate(ImplicationGraph.java:145) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.biesenb.BPredicateUnifier.getOrConstructPredicateInternal(BPredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.biesenb.BPredicateUnifier.getOrConstructPredicate(BPredicateUnifier.java:320) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:575) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:286) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:375) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:313) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-09-30 10:53:40,106 INFO L168 Benchmark]: Toolchain (without parser) took 17221.25 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 438.8 MB). Peak memory consumption was 438.8 MB. Max. memory is 7.1 GB. [2018-09-30 10:53:40,108 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:53:40,109 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:53:40,110 INFO L168 Benchmark]: Boogie Preprocessor took 20.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:53:40,111 INFO L168 Benchmark]: RCFGBuilder took 342.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:53:40,112 INFO L168 Benchmark]: TraceAbstraction took 16811.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 417.7 MB). Peak memory consumption was 417.7 MB. Max. memory is 7.1 GB. [2018-09-30 10:53:40,120 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 0.24 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 39.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.62 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 342.59 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 16811.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 417.7 MB). Peak memory consumption was 417.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Cannot handle case were solver cannot decide implication of predicates de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Cannot handle case were solver cannot decide implication of predicates: de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.biesenb.ImplicationGraph.internImplication(ImplicationGraph.java:316) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/num_conversion_1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-53-40-139.csv Received shutdown request...