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/nested1.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:51:14,713 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:51:14,715 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:51:14,727 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:51:14,727 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:51:14,729 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:51:14,730 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:51:14,732 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:51:14,733 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:51:14,734 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:51:14,735 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:51:14,765 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 [2018-09-26 21:51:14,798 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:51:14,799 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:51:14,800 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:51:14,801 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:51:14,801 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:51:14,801 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:51:14,802 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:51:14,802 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:51:14,802 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:51:14,802 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:51:14,804 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:51:14,804 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:51:14,804 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:51:14,804 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:51:14,804 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:51:14,805 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:51:14,805 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:51:14,805 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:51:14,805 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:51:14,806 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:51:14,806 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:51:14,806 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:51:14,806 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:51:14,808 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:51:14,808 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:51:14,808 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:51:14,808 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:51:14,808 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:51:14,809 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:51:14,809 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:51:14,809 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:51:14,872 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:51:14,887 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:51:14,894 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:51:14,896 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:51:14,897 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:51:14,898 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl [2018-09-26 21:51:14,898 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl' [2018-09-26 21:51:14,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:51:14,955 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:51:14,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:51:14,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:51:14,956 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:51:14,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:51:14" (1/1) ... [2018-09-26 21:51:14,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:51:14" (1/1) ... [2018-09-26 21:51:14,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:51:14,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:51:14,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:51:14,996 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:51:15,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:51:14" (1/1) ... [2018-09-26 21:51:15,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:51:14" (1/1) ... [2018-09-26 21:51:15,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:51:14" (1/1) ... [2018-09-26 21:51:15,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:51:14" (1/1) ... [2018-09-26 21:51:15,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:51:14" (1/1) ... [2018-09-26 21:51:15,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:51:14" (1/1) ... [2018-09-26 21:51:15,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:51:14" (1/1) ... [2018-09-26 21:51:15,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:51:15,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:51:15,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:51:15,016 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:51:15,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:51:14" (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 [2018-09-26 21:51:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:51:15,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:51:15,318 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:51:15,318 INFO L202 PluginConnector]: Adding new model nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:51:15 BoogieIcfgContainer [2018-09-26 21:51:15,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:51:15,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:51:15,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:51:15,324 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:51:15,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:51:14" (1/2) ... [2018-09-26 21:51:15,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0b65a6 and model type nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:51:15, skipping insertion in model container [2018-09-26 21:51:15,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:51:15" (2/2) ... [2018-09-26 21:51:15,328 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bpl [2018-09-26 21:51:15,338 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:51:15,350 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:51:15,394 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:51:15,395 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:51:15,396 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:51:15,396 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:51:15,396 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:51:15,396 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:51:15,396 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:51:15,397 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:51:15,397 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:51:15,409 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-26 21:51:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:51:15,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:15,417 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:51:15,418 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:15,426 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:15,426 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-26 21:51:15,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:15,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:15,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:15,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:15,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:15,604 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:51:15,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:51:15,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:51:15,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:51:15,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:15,622 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-26 21:51:15,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:15,826 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-26 21:51:15,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:51:15,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 21:51:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:15,841 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:51:15,841 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:51:15,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:51:15,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-09-26 21:51:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:51:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-26 21:51:15,883 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-09-26 21:51:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:15,883 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-26 21:51:15,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:51:15,884 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-26 21:51:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:51:15,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:15,885 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:51:15,885 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:15,885 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-09-26 21:51:15,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:15,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:15,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:15,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:15,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:15,941 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:51:15,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:51:15,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:51:15,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:51:15,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:15,944 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-09-26 21:51:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:15,996 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-09-26 21:51:15,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:51:15,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-09-26 21:51:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:15,998 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:51:15,998 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:51:15,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:51:16,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:51:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:51:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-26 21:51:16,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-26 21:51:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:16,003 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-26 21:51:16,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:51:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-26 21:51:16,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:51:16,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:16,004 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:51:16,005 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:16,005 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:16,005 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-09-26 21:51:16,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:16,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:16,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:16,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:16,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:16,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:16,097 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 [2018-09-26 21:51:16,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:16,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:51:16,358 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:16,359 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-09-26 21:51:16,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:51:16,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:51:16,360 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:16,360 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-09-26 21:51:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:17,243 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-09-26 21:51:17,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:51:17,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-26 21:51:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:17,246 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:51:17,246 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:51:17,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:51:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-09-26 21:51:17,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:51:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-26 21:51:17,255 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2018-09-26 21:51:17,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:17,255 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-26 21:51:17,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:51:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-26 21:51:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:51:17,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:17,257 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1] [2018-09-26 21:51:17,257 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:17,258 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:17,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1881088987, now seen corresponding path program 2 times [2018-09-26 21:51:17,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:17,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:17,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:17,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:17,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-26 21:51:17,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:17,399 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 [2018-09-26 21:51:17,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:51:17,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:51:17,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:17,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-26 21:51:17,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:17,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-09-26 21:51:17,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:51:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:51:17,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:17,782 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2018-09-26 21:51:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:19,257 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-09-26 21:51:19,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:51:19,258 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-09-26 21:51:19,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:19,259 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:51:19,259 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:51:19,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:51:19,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2018-09-26 21:51:19,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:51:19,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-09-26 21:51:19,270 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2018-09-26 21:51:19,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:19,271 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-09-26 21:51:19,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:51:19,271 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-09-26 21:51:19,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:51:19,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:19,272 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 4, 3, 3, 1, 1, 1] [2018-09-26 21:51:19,273 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:19,273 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:19,273 INFO L82 PathProgramCache]: Analyzing trace with hash 501354739, now seen corresponding path program 3 times [2018-09-26 21:51:19,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:19,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:19,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:19,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:19,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-26 21:51:19,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:19,446 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 [2018-09-26 21:51:19,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:51:19,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-26 21:51:19,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:19,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-09-26 21:51:19,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:19,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:51:19,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:51:19,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:51:19,565 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:19,565 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2018-09-26 21:51:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:19,764 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2018-09-26 21:51:19,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:51:19,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-09-26 21:51:19,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:19,766 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:51:19,766 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:51:19,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:51:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:51:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:51:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-09-26 21:51:19,776 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2018-09-26 21:51:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:19,777 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-09-26 21:51:19,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:51:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-09-26 21:51:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:51:19,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:19,779 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-09-26 21:51:19,779 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:19,779 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:19,779 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-09-26 21:51:19,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:19,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:19,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:19,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:19,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-09-26 21:51:19,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:19,990 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 [2018-09-26 21:51:20,000 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:51:20,020 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:51:20,020 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:20,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-09-26 21:51:20,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:20,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 9 [2018-09-26 21:51:20,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:51:20,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:51:20,790 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:20,790 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2018-09-26 21:51:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:21,387 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2018-09-26 21:51:21,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:51:21,388 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-09-26 21:51:21,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:21,390 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:51:21,390 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:51:21,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:51:21,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2018-09-26 21:51:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:51:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-09-26 21:51:21,404 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 40 [2018-09-26 21:51:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:21,404 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-09-26 21:51:21,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:51:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-09-26 21:51:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:51:21,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:21,407 INFO L375 BasicCegarLoop]: trace histogram [20, 16, 5, 4, 4, 1, 1, 1] [2018-09-26 21:51:21,407 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:21,407 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:21,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1874565441, now seen corresponding path program 5 times [2018-09-26 21:51:21,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:21,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:21,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:21,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:21,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-09-26 21:51:21,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:21,627 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 [2018-09-26 21:51:21,635 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:51:21,654 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:51:21,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:21,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 262 proven. 20 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-09-26 21:51:21,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:21,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-26 21:51:21,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:51:21,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:51:21,868 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:21,869 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 12 states. [2018-09-26 21:51:26,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:26,529 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2018-09-26 21:51:26,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:51:26,530 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-09-26 21:51:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:26,531 INFO L225 Difference]: With dead ends: 127 [2018-09-26 21:51:26,531 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:51:26,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:26,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:51:26,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2018-09-26 21:51:26,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:51:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-09-26 21:51:26,548 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 52 [2018-09-26 21:51:26,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:26,548 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-09-26 21:51:26,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:51:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-09-26 21:51:26,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:51:26,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:26,553 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 6, 5, 5, 1, 1, 1] [2018-09-26 21:51:26,553 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:26,553 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:26,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1734028097, now seen corresponding path program 6 times [2018-09-26 21:51:26,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:26,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:26,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:26,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:26,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-09-26 21:51:26,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:26,872 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 [2018-09-26 21:51:26,885 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:51:26,985 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-09-26 21:51:26,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:26,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 520 proven. 30 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-09-26 21:51:27,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:27,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-26 21:51:27,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:51:27,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:51:27,132 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:27,132 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 14 states. [2018-09-26 21:51:33,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:33,737 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2018-09-26 21:51:33,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:51:33,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-09-26 21:51:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:33,738 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:51:33,738 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:51:33,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:51:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2018-09-26 21:51:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:51:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2018-09-26 21:51:33,757 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 74 [2018-09-26 21:51:33,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:33,757 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2018-09-26 21:51:33,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:51:33,758 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2018-09-26 21:51:33,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:51:33,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:33,760 INFO L375 BasicCegarLoop]: trace histogram [42, 36, 7, 6, 6, 1, 1, 1] [2018-09-26 21:51:33,760 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:33,760 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:33,760 INFO L82 PathProgramCache]: Analyzing trace with hash 883432563, now seen corresponding path program 7 times [2018-09-26 21:51:33,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:33,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:33,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:33,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:33,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-09-26 21:51:34,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:34,182 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 [2018-09-26 21:51:34,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:34,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1554 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-26 21:51:34,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:34,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 14 [2018-09-26 21:51:34,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:51:34,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:51:34,854 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:34,854 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 15 states. [2018-09-26 21:51:36,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:36,170 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2018-09-26 21:51:36,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:51:36,170 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2018-09-26 21:51:36,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:36,172 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:51:36,172 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:51:36,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:51:36,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2018-09-26 21:51:36,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:51:36,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2018-09-26 21:51:36,195 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 100 [2018-09-26 21:51:36,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:36,195 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2018-09-26 21:51:36,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:51:36,196 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2018-09-26 21:51:36,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:51:36,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:36,198 INFO L375 BasicCegarLoop]: trace histogram [49, 42, 8, 7, 7, 1, 1, 1] [2018-09-26 21:51:36,198 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:36,198 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:36,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1346298395, now seen corresponding path program 8 times [2018-09-26 21:51:36,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:36,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:36,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:36,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:51:36,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-09-26 21:51:36,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:36,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:36,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:51:36,441 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:51:36,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:36,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-09-26 21:51:36,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:36,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:51:36,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:51:36,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:51:36,751 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:36,751 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 10 states. [2018-09-26 21:51:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:37,334 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2018-09-26 21:51:37,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:51:37,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 116 [2018-09-26 21:51:37,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:37,337 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:51:37,337 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:51:37,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:51:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2018-09-26 21:51:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:51:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2018-09-26 21:51:37,365 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 116 [2018-09-26 21:51:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:37,366 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2018-09-26 21:51:37,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:51:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2018-09-26 21:51:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:51:37,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:37,368 INFO L375 BasicCegarLoop]: trace histogram [56, 48, 9, 8, 8, 1, 1, 1] [2018-09-26 21:51:37,369 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:37,369 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1851587415, now seen corresponding path program 9 times [2018-09-26 21:51:37,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:37,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:37,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:37,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:37,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 0 proven. 2816 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-09-26 21:51:37,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:37,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:37,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:51:37,782 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:51:37,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:37,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 702 proven. 42 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked. [2018-09-26 21:51:37,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:37,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-09-26 21:51:37,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:51:37,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:51:37,978 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:37,978 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 18 states. [2018-09-26 21:51:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:51:52,490 INFO L93 Difference]: Finished difference Result 299 states and 327 transitions. [2018-09-26 21:51:52,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:51:52,491 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 132 [2018-09-26 21:51:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:51:52,492 INFO L225 Difference]: With dead ends: 299 [2018-09-26 21:51:52,492 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:51:52,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:51:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:51:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2018-09-26 21:51:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-26 21:51:52,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2018-09-26 21:51:52,520 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 132 [2018-09-26 21:51:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:51:52,520 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2018-09-26 21:51:52,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:51:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2018-09-26 21:51:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-26 21:51:52,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:51:52,523 INFO L375 BasicCegarLoop]: trace histogram [72, 63, 10, 9, 9, 1, 1, 1] [2018-09-26 21:51:52,523 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:51:52,524 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:51:52,524 INFO L82 PathProgramCache]: Analyzing trace with hash -132347917, now seen corresponding path program 10 times [2018-09-26 21:51:52,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:51:52,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:51:52,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:52,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:51:52,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:51:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:51:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4698 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2018-09-26 21:51:52,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:51:52,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-26 21:51:53,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:51:53,065 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:51:53,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:51:53,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:51:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 1952 proven. 56 refuted. 0 times theorem prover too weak. 3194 trivial. 0 not checked. [2018-09-26 21:51:53,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:51:53,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-26 21:51:53,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:51:53,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:51:53,379 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:51:53,379 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand 20 states. [2018-09-26 21:52:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:12,532 INFO L93 Difference]: Finished difference Result 371 states and 402 transitions. [2018-09-26 21:52:12,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 21:52:12,539 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2018-09-26 21:52:12,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:12,540 INFO L225 Difference]: With dead ends: 371 [2018-09-26 21:52:12,541 INFO L226 Difference]: Without dead ends: 223 [2018-09-26 21:52:12,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-26 21:52:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 205. [2018-09-26 21:52:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-26 21:52:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions. [2018-09-26 21:52:12,589 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 166 [2018-09-26 21:52:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:12,590 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 215 transitions. [2018-09-26 21:52:12,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:52:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions. [2018-09-26 21:52:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-26 21:52:12,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:12,597 INFO L375 BasicCegarLoop]: trace histogram [90, 80, 11, 10, 10, 1, 1, 1] [2018-09-26 21:52:12,597 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:12,598 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:12,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1568317117, now seen corresponding path program 11 times [2018-09-26 21:52:12,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:12,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:12,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:12,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:52:12,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 0 proven. 7400 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-09-26 21:52:12,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:12,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:52:12,935 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:52:13,146 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:52:13,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:52:13,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 3774 proven. 72 refuted. 0 times theorem prover too weak. 4274 trivial. 0 not checked. [2018-09-26 21:52:13,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:13,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-09-26 21:52:13,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:52:13,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:52:13,473 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:13,473 INFO L87 Difference]: Start difference. First operand 205 states and 215 transitions. Second operand 22 states. [2018-09-26 21:52:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:52:42,631 INFO L93 Difference]: Finished difference Result 451 states and 485 transitions. [2018-09-26 21:52:42,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-26 21:52:42,632 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 204 [2018-09-26 21:52:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:52:42,633 INFO L225 Difference]: With dead ends: 451 [2018-09-26 21:52:42,633 INFO L226 Difference]: Without dead ends: 267 [2018-09-26 21:52:42,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:52:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-26 21:52:42,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2018-09-26 21:52:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-26 21:52:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions. [2018-09-26 21:52:42,663 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 204 [2018-09-26 21:52:42,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:52:42,664 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 258 transitions. [2018-09-26 21:52:42,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:52:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions. [2018-09-26 21:52:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-26 21:52:42,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:52:42,667 INFO L375 BasicCegarLoop]: trace histogram [110, 99, 12, 11, 11, 1, 1, 1] [2018-09-26 21:52:42,667 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:52:42,667 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:52:42,668 INFO L82 PathProgramCache]: Analyzing trace with hash 915329223, now seen corresponding path program 12 times [2018-09-26 21:52:42,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:52:42,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:52:42,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:42,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:52:42,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:52:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:52:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 0 proven. 11132 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-26 21:52:43,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:52:43,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:52:43,098 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:52:47,941 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-09-26 21:52:47,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:52:47,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:52:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 2022 proven. 90 refuted. 0 times theorem prover too weak. 10010 trivial. 0 not checked. [2018-09-26 21:52:48,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:52:48,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-09-26 21:52:48,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:52:48,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:52:48,333 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:52:48,333 INFO L87 Difference]: Start difference. First operand 247 states and 258 transitions. Second operand 24 states. [2018-09-26 21:53:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:53:33,080 INFO L93 Difference]: Finished difference Result 539 states and 576 transitions. [2018-09-26 21:53:33,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-26 21:53:33,081 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 246 [2018-09-26 21:53:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:53:33,082 INFO L225 Difference]: With dead ends: 539 [2018-09-26 21:53:33,083 INFO L226 Difference]: Without dead ends: 315 [2018-09-26 21:53:33,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:53:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-26 21:53:33,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 293. [2018-09-26 21:53:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-09-26 21:53:33,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 305 transitions. [2018-09-26 21:53:33,124 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 305 transitions. Word has length 246 [2018-09-26 21:53:33,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:53:33,124 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 305 transitions. [2018-09-26 21:53:33,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:53:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 305 transitions. [2018-09-26 21:53:33,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-09-26 21:53:33,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:53:33,128 INFO L375 BasicCegarLoop]: trace histogram [132, 120, 13, 12, 12, 1, 1, 1] [2018-09-26 21:53:33,128 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:53:33,129 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:53:33,129 INFO L82 PathProgramCache]: Analyzing trace with hash 154612223, now seen corresponding path program 13 times [2018-09-26 21:53:33,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:53:33,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:53:33,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:53:33,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:53:33,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:53:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:53:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-26 21:53:34,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:53:34,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:53:34,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:53:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:53:34,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:53:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-26 21:53:35,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:53:35,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:53:35,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:53:35,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:53:35,184 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:53:35,184 INFO L87 Difference]: Start difference. First operand 293 states and 305 transitions. Second operand 15 states. [2018-09-26 21:53:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:53:36,525 INFO L93 Difference]: Finished difference Result 341 states and 355 transitions. [2018-09-26 21:53:36,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:53:36,526 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 292 [2018-09-26 21:53:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:53:36,528 INFO L225 Difference]: With dead ends: 341 [2018-09-26 21:53:36,528 INFO L226 Difference]: Without dead ends: 339 [2018-09-26 21:53:36,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:53:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-26 21:53:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 317. [2018-09-26 21:53:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-09-26 21:53:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 330 transitions. [2018-09-26 21:53:36,570 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 330 transitions. Word has length 292 [2018-09-26 21:53:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:53:36,570 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 330 transitions. [2018-09-26 21:53:36,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:53:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 330 transitions. [2018-09-26 21:53:36,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-09-26 21:53:36,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:53:36,572 INFO L375 BasicCegarLoop]: trace histogram [143, 130, 14, 13, 13, 1, 1, 1] [2018-09-26 21:53:36,572 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:53:36,573 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:53:36,573 INFO L82 PathProgramCache]: Analyzing trace with hash -114885159, now seen corresponding path program 14 times [2018-09-26 21:53:36,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:53:36,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:53:36,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:53:36,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:53:36,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:53:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:53:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-26 21:53:37,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:53:37,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:53:37,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:53:37,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:53:37,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:53:37,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:53:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-26 21:53:38,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:53:38,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:53:38,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:53:38,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:53:38,343 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:53:38,343 INFO L87 Difference]: Start difference. First operand 317 states and 330 transitions. Second operand 16 states. [2018-09-26 21:53:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:53:39,988 INFO L93 Difference]: Finished difference Result 365 states and 380 transitions. [2018-09-26 21:53:39,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:53:39,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 316 [2018-09-26 21:53:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:53:39,990 INFO L225 Difference]: With dead ends: 365 [2018-09-26 21:53:39,991 INFO L226 Difference]: Without dead ends: 363 [2018-09-26 21:53:39,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:53:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-26 21:53:40,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2018-09-26 21:53:40,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-09-26 21:53:40,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 355 transitions. [2018-09-26 21:53:40,041 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 355 transitions. Word has length 316 [2018-09-26 21:53:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:53:40,041 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 355 transitions. [2018-09-26 21:53:40,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:53:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 355 transitions. [2018-09-26 21:53:40,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-09-26 21:53:40,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:53:40,044 INFO L375 BasicCegarLoop]: trace histogram [154, 140, 15, 14, 14, 1, 1, 1] [2018-09-26 21:53:40,044 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:53:40,044 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:53:40,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1438164045, now seen corresponding path program 15 times [2018-09-26 21:53:40,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:53:40,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:53:40,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:53:40,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:53:40,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:53:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:53:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 23772 backedges. 0 proven. 22232 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-26 21:53:40,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:53:40,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:53:40,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown