java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:24:29,775 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:24:29,777 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:24:29,789 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:24:29,789 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:24:29,790 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:24:29,791 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:24:29,794 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:24:29,796 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:24:29,797 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:24:29,798 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:24:29,821 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-26 21:24:29,854 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:24:29,854 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:24:29,855 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:24:29,855 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:24:29,856 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:24:29,856 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:24:29,856 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:24:29,857 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:24:29,857 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:24:29,857 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:24:29,857 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:24:29,857 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:24:29,858 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:24:29,858 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:24:29,858 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:24:29,858 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:24:29,858 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:24:29,859 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:24:29,859 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:24:29,859 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:24:29,859 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:24:29,859 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:24:29,860 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:24:29,860 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:24:29,860 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:24:29,860 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:24:29,860 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:24:29,861 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:24:29,861 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:24:29,861 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:24:29,910 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:24:29,923 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:24:29,928 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:24:29,930 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:24:29,931 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:24:29,931 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl [2018-09-26 21:24:29,932 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl' [2018-09-26 21:24:29,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:24:29,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:24:29,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:24:29,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:24:29,996 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:24:30,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:24:29" (1/1) ... [2018-09-26 21:24:30,029 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:24:29" (1/1) ... [2018-09-26 21:24:30,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:24:30,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:24:30,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:24:30,038 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:24:30,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:24:29" (1/1) ... [2018-09-26 21:24:30,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:24:29" (1/1) ... [2018-09-26 21:24:30,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:24:29" (1/1) ... [2018-09-26 21:24:30,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:24:29" (1/1) ... [2018-09-26 21:24:30,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:24:29" (1/1) ... [2018-09-26 21:24:30,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:24:29" (1/1) ... [2018-09-26 21:24:30,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:24:29" (1/1) ... [2018-09-26 21:24:30,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:24:30,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:24:30,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:24:30,061 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:24:30,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:24:29" (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 21:24:30,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:24:30,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:24:30,403 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:24:30,403 INFO L202 PluginConnector]: Adding new model nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:24:30 BoogieIcfgContainer [2018-09-26 21:24:30,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:24:30,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:24:30,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:24:30,408 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:24:30,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:24:29" (1/2) ... [2018-09-26 21:24:30,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e23c0e and model type nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:24:30, skipping insertion in model container [2018-09-26 21:24:30,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:24:30" (2/2) ... [2018-09-26 21:24:30,411 INFO L112 eAbstractionObserver]: Analyzing ICFG nested.i_4.bpl [2018-09-26 21:24:30,421 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:24:30,429 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:24:30,479 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:24:30,480 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:24:30,480 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:24:30,480 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:24:30,480 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:24:30,481 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:24:30,481 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:24:30,481 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:24:30,481 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:24:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-26 21:24:30,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:24:30,501 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:30,502 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:24:30,503 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:30,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:30,509 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-26 21:24:30,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:30,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:30,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:30,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:30,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:30,657 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 21:24:30,659 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:24:30,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:24:30,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:24:30,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:24:30,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:24:30,677 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-26 21:24:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:30,731 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-26 21:24:30,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:24:30,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-26 21:24:30,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:30,743 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:24:30,743 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:24:30,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:24:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:24:30,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-09-26 21:24:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:24:30,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-26 21:24:30,780 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-09-26 21:24:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:30,780 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-26 21:24:30,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:24:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-26 21:24:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:24:30,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:30,782 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:24:30,782 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:30,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:30,782 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-09-26 21:24:30,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:30,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:30,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:30,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:30,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:30,917 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 21:24:30,917 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:24:30,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:24:30,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:24:30,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:24:30,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:24:30,920 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-09-26 21:24:31,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:31,035 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-09-26 21:24:31,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:24:31,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-26 21:24:31,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:31,038 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:24:31,038 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:24:31,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:24:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:24:31,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:24:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:24:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-26 21:24:31,044 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-26 21:24:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:31,044 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-26 21:24:31,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:24:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-26 21:24:31,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:24:31,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:31,045 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:24:31,045 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:31,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:31,046 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-09-26 21:24:31,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:31,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:31,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:31,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:31,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:31,144 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 21:24:31,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:31,145 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 21:24:31,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:31,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:31,432 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 21:24:31,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:31,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-09-26 21:24:31,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:24:31,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:24:31,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:24:31,456 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-09-26 21:24:31,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:31,521 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-26 21:24:31,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:24:31,522 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-26 21:24:31,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:31,523 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:24:31,523 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:24:31,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:24:31,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:24:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:24:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:24:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-26 21:24:31,529 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-26 21:24:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:31,529 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-26 21:24:31,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:24:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-26 21:24:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:24:31,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:31,531 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-26 21:24:31,531 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:31,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:31,531 INFO L82 PathProgramCache]: Analyzing trace with hash -928778543, now seen corresponding path program 2 times [2018-09-26 21:24:31,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:31,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:31,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:31,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:31,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:31,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:31,777 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 21:24:31,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:24:31,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:24:31,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:31,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-26 21:24:32,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:32,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2018-09-26 21:24:32,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:24:32,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:24:32,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:24:32,084 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-26 21:24:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:32,517 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2018-09-26 21:24:32,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:24:32,518 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-26 21:24:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:32,519 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:24:32,521 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:24:32,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:24:32,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:24:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2018-09-26 21:24:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:24:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-26 21:24:32,542 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2018-09-26 21:24:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:32,543 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-26 21:24:32,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:24:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-26 21:24:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:24:32,545 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:32,545 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 3, 2, 2, 1, 1, 1] [2018-09-26 21:24:32,545 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:32,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:32,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1778757007, now seen corresponding path program 3 times [2018-09-26 21:24:32,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:32,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:32,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:32,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:32,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-26 21:24:32,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:32,739 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 21:24:32,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:24:32,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:24:32,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:32,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-26 21:24:33,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:33,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2018-09-26 21:24:33,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:24:33,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:24:33,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:24:33,096 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-09-26 21:24:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:33,662 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2018-09-26 21:24:33,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:24:33,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-09-26 21:24:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:33,666 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:24:33,667 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:24:33,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:24:33,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:24:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-09-26 21:24:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:24:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-09-26 21:24:33,680 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 24 [2018-09-26 21:24:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:33,681 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-09-26 21:24:33,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:24:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-09-26 21:24:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:24:33,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:33,682 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-09-26 21:24:33,682 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:33,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:33,683 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-09-26 21:24:33,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:33,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:33,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:33,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:33,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:33,829 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-09-26 21:24:33,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:33,830 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 21:24:33,845 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:24:33,874 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:24:33,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:33,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-09-26 21:24:33,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:33,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-09-26 21:24:33,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:24:33,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:24:33,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:24:33,995 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2018-09-26 21:24:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:34,045 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2018-09-26 21:24:34,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:24:34,045 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2018-09-26 21:24:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:34,046 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:24:34,046 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:24:34,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:24:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:24:34,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:24:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:24:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-09-26 21:24:34,060 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2018-09-26 21:24:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:34,061 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-09-26 21:24:34,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:24:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-09-26 21:24:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:24:34,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:34,063 INFO L375 BasicCegarLoop]: trace histogram [18, 15, 4, 3, 3, 1, 1, 1] [2018-09-26 21:24:34,063 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:34,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:34,063 INFO L82 PathProgramCache]: Analyzing trace with hash -254509681, now seen corresponding path program 5 times [2018-09-26 21:24:34,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:34,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:34,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:34,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:34,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-26 21:24:34,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:34,327 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 21:24:34,345 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:24:34,388 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-26 21:24:34,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:34,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-26 21:24:34,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:34,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-09-26 21:24:34,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:24:34,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:24:34,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:24:34,643 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2018-09-26 21:24:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:34,697 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2018-09-26 21:24:34,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:24:34,698 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2018-09-26 21:24:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:34,699 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:24:34,699 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:24:34,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:24:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:24:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:24:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:24:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2018-09-26 21:24:34,712 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2018-09-26 21:24:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:34,713 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2018-09-26 21:24:34,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:24:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2018-09-26 21:24:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:24:34,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:34,714 INFO L375 BasicCegarLoop]: trace histogram [21, 18, 4, 3, 3, 1, 1, 1] [2018-09-26 21:24:34,715 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:34,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:34,715 INFO L82 PathProgramCache]: Analyzing trace with hash -996261859, now seen corresponding path program 6 times [2018-09-26 21:24:34,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:34,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:34,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:34,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:34,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 202 proven. 42 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-26 21:24:34,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:34,849 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 21:24:34,856 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:24:34,874 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-26 21:24:34,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:34,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-26 21:24:35,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:35,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2018-09-26 21:24:35,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:24:35,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:24:35,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:24:35,030 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 14 states. [2018-09-26 21:24:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:36,909 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2018-09-26 21:24:36,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:24:36,909 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2018-09-26 21:24:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:36,911 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:24:36,911 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:24:36,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=850, Invalid=1906, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:24:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:24:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2018-09-26 21:24:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:24:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2018-09-26 21:24:36,934 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 52 [2018-09-26 21:24:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:36,935 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2018-09-26 21:24:36,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:24:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2018-09-26 21:24:36,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:24:36,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:36,938 INFO L375 BasicCegarLoop]: trace histogram [32, 28, 5, 4, 4, 1, 1, 1] [2018-09-26 21:24:36,938 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:36,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:36,939 INFO L82 PathProgramCache]: Analyzing trace with hash -252111625, now seen corresponding path program 7 times [2018-09-26 21:24:36,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:36,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:36,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:36,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:36,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-09-26 21:24:37,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:37,275 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 21:24:37,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:37,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-09-26 21:24:38,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:38,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-09-26 21:24:38,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:24:38,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:24:38,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:24:38,321 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 19 states. [2018-09-26 21:24:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:38,384 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2018-09-26 21:24:38,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:24:38,388 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2018-09-26 21:24:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:38,389 INFO L225 Difference]: With dead ends: 143 [2018-09-26 21:24:38,389 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:24:38,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:24:38,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:24:38,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:24:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:24:38,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2018-09-26 21:24:38,408 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2018-09-26 21:24:38,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:38,408 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2018-09-26 21:24:38,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:24:38,408 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2018-09-26 21:24:38,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:24:38,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:38,410 INFO L375 BasicCegarLoop]: trace histogram [36, 32, 5, 4, 4, 1, 1, 1] [2018-09-26 21:24:38,410 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:38,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:38,411 INFO L82 PathProgramCache]: Analyzing trace with hash 771511391, now seen corresponding path program 8 times [2018-09-26 21:24:38,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:38,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:38,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:38,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:38,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-09-26 21:24:38,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:38,677 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 21:24:38,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:24:38,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:24:38,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:38,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-09-26 21:24:39,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:39,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-09-26 21:24:39,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:24:39,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:24:39,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:24:39,053 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 21 states. [2018-09-26 21:24:39,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:39,116 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2018-09-26 21:24:39,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:24:39,123 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2018-09-26 21:24:39,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:39,124 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:24:39,124 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:24:39,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:24:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:24:39,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:24:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:24:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2018-09-26 21:24:39,153 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2018-09-26 21:24:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:39,153 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2018-09-26 21:24:39,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:24:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2018-09-26 21:24:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:24:39,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:39,155 INFO L375 BasicCegarLoop]: trace histogram [40, 36, 5, 4, 4, 1, 1, 1] [2018-09-26 21:24:39,156 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:39,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:39,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1630563271, now seen corresponding path program 9 times [2018-09-26 21:24:39,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:39,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:39,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:39,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:39,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-09-26 21:24:39,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:39,333 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 21:24:39,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:24:39,422 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-26 21:24:39,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:39,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-09-26 21:24:39,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:39,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-09-26 21:24:39,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:24:39,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:24:39,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:24:39,772 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 23 states. [2018-09-26 21:24:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:39,831 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2018-09-26 21:24:39,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:24:39,838 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2018-09-26 21:24:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:39,839 INFO L225 Difference]: With dead ends: 171 [2018-09-26 21:24:39,839 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:24:39,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:24:39,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:24:39,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:24:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:24:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2018-09-26 21:24:39,857 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2018-09-26 21:24:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:39,858 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2018-09-26 21:24:39,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:24:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2018-09-26 21:24:39,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:24:39,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:39,860 INFO L375 BasicCegarLoop]: trace histogram [44, 40, 5, 4, 4, 1, 1, 1] [2018-09-26 21:24:39,860 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:39,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:39,860 INFO L82 PathProgramCache]: Analyzing trace with hash -220374225, now seen corresponding path program 10 times [2018-09-26 21:24:39,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:39,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:39,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:39,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:39,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:40,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-26 21:24:40,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:40,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:24:40,039 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:24:40,095 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:24:40,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:40,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-26 21:24:40,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:40,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-26 21:24:40,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:24:40,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:24:40,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:24:40,237 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 12 states. [2018-09-26 21:24:40,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:40,515 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-09-26 21:24:40,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:24:40,515 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2018-09-26 21:24:40,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:40,516 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:24:40,517 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:24:40,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:24:40,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:24:40,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 125. [2018-09-26 21:24:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:24:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2018-09-26 21:24:40,540 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 100 [2018-09-26 21:24:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:40,541 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2018-09-26 21:24:40,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:24:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2018-09-26 21:24:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:24:40,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:40,543 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 6, 5, 5, 1, 1, 1] [2018-09-26 21:24:40,543 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:40,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:40,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1446024969, now seen corresponding path program 11 times [2018-09-26 21:24:40,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:40,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:40,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:40,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:40,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-26 21:24:40,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:40,967 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 21:24:40,977 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:24:41,047 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-26 21:24:41,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:41,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-26 21:24:41,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:41,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-26 21:24:41,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:24:41,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:24:41,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:24:41,226 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand 14 states. [2018-09-26 21:24:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:41,365 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2018-09-26 21:24:41,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:24:41,366 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2018-09-26 21:24:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:41,367 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:24:41,367 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:24:41,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:24:41,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:24:41,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 149. [2018-09-26 21:24:41,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:24:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2018-09-26 21:24:41,397 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 124 [2018-09-26 21:24:41,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:41,398 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2018-09-26 21:24:41,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:24:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2018-09-26 21:24:41,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:24:41,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:41,400 INFO L375 BasicCegarLoop]: trace histogram [66, 60, 7, 6, 6, 1, 1, 1] [2018-09-26 21:24:41,400 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:41,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1667523811, now seen corresponding path program 12 times [2018-09-26 21:24:41,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:41,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:41,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:41,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:41,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-26 21:24:41,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:41,659 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 21:24:41,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:24:41,790 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-26 21:24:41,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:41,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-26 21:24:42,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:42,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-26 21:24:42,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:24:42,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:24:42,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:24:42,002 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand 16 states. [2018-09-26 21:24:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:42,174 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2018-09-26 21:24:42,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:24:42,175 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 148 [2018-09-26 21:24:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:42,176 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:24:42,176 INFO L226 Difference]: Without dead ends: 195 [2018-09-26 21:24:42,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:24:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-26 21:24:42,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2018-09-26 21:24:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-26 21:24:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 180 transitions. [2018-09-26 21:24:42,204 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 180 transitions. Word has length 148 [2018-09-26 21:24:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:42,204 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 180 transitions. [2018-09-26 21:24:42,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:24:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 180 transitions. [2018-09-26 21:24:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-26 21:24:42,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:42,206 INFO L375 BasicCegarLoop]: trace histogram [77, 70, 8, 7, 7, 1, 1, 1] [2018-09-26 21:24:42,206 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:42,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:42,207 INFO L82 PathProgramCache]: Analyzing trace with hash 107136189, now seen corresponding path program 13 times [2018-09-26 21:24:42,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:42,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:42,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:42,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:42,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-26 21:24:42,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:42,485 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 21:24:42,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:42,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-26 21:24:42,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:42,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-26 21:24:42,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:24:42,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:24:42,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:24:42,826 INFO L87 Difference]: Start difference. First operand 173 states and 180 transitions. Second operand 18 states. [2018-09-26 21:24:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:42,919 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2018-09-26 21:24:42,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:24:42,919 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 172 [2018-09-26 21:24:42,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:42,921 INFO L225 Difference]: With dead ends: 221 [2018-09-26 21:24:42,921 INFO L226 Difference]: Without dead ends: 219 [2018-09-26 21:24:42,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:24:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-26 21:24:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 197. [2018-09-26 21:24:42,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-26 21:24:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 205 transitions. [2018-09-26 21:24:42,958 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 205 transitions. Word has length 172 [2018-09-26 21:24:42,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:42,959 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 205 transitions. [2018-09-26 21:24:42,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:24:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 205 transitions. [2018-09-26 21:24:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-26 21:24:42,961 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:42,962 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 9, 8, 8, 1, 1, 1] [2018-09-26 21:24:42,962 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:42,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:42,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1927956841, now seen corresponding path program 14 times [2018-09-26 21:24:42,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:42,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:42,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:42,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:42,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-26 21:24:43,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:43,836 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 21:24:43,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:24:43,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:24:43,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:43,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-26 21:24:44,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:44,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-26 21:24:44,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:24:44,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:24:44,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:24:44,199 INFO L87 Difference]: Start difference. First operand 197 states and 205 transitions. Second operand 20 states. [2018-09-26 21:24:44,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:44,304 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2018-09-26 21:24:44,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:24:44,304 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 196 [2018-09-26 21:24:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:44,305 INFO L225 Difference]: With dead ends: 245 [2018-09-26 21:24:44,306 INFO L226 Difference]: Without dead ends: 243 [2018-09-26 21:24:44,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:24:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-26 21:24:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2018-09-26 21:24:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-26 21:24:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2018-09-26 21:24:44,350 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 196 [2018-09-26 21:24:44,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:44,351 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2018-09-26 21:24:44,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:24:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2018-09-26 21:24:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-26 21:24:44,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:44,353 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 10, 9, 9, 1, 1, 1] [2018-09-26 21:24:44,353 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:44,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:44,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1486407055, now seen corresponding path program 15 times [2018-09-26 21:24:44,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:44,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:44,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:44,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:44,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-26 21:24:44,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:44,740 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 21:24:44,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:24:44,898 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2018-09-26 21:24:44,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:44,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-26 21:24:45,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:45,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-26 21:24:45,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:24:45,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:24:45,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:24:45,121 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand 22 states. [2018-09-26 21:24:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:45,426 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2018-09-26 21:24:45,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:24:45,426 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 220 [2018-09-26 21:24:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:45,428 INFO L225 Difference]: With dead ends: 269 [2018-09-26 21:24:45,428 INFO L226 Difference]: Without dead ends: 267 [2018-09-26 21:24:45,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:24:45,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-26 21:24:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 245. [2018-09-26 21:24:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-26 21:24:45,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 255 transitions. [2018-09-26 21:24:45,478 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 255 transitions. Word has length 220 [2018-09-26 21:24:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:45,478 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 255 transitions. [2018-09-26 21:24:45,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:24:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 255 transitions. [2018-09-26 21:24:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-26 21:24:45,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:45,480 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 11, 10, 10, 1, 1, 1] [2018-09-26 21:24:45,480 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:45,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:45,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1732333643, now seen corresponding path program 16 times [2018-09-26 21:24:45,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:45,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:45,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:45,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:45,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 12082 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-26 21:24:51,074 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:24:51,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-09-26 21:24:51,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-26 21:24:51,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-26 21:24:51,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:24:51,078 INFO L87 Difference]: Start difference. First operand 245 states and 255 transitions. Second operand 103 states. [2018-09-26 21:24:54,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:54,039 INFO L93 Difference]: Finished difference Result 10235 states and 10695 transitions. [2018-09-26 21:24:54,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-26 21:24:54,039 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 244 [2018-09-26 21:24:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:54,040 INFO L225 Difference]: With dead ends: 10235 [2018-09-26 21:24:54,040 INFO L226 Difference]: Without dead ends: 0 [2018-09-26 21:24:54,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:24:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-26 21:24:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-26 21:24:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-26 21:24:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-26 21:24:54,058 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 244 [2018-09-26 21:24:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:54,058 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-26 21:24:54,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-26 21:24:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-26 21:24:54,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-26 21:24:54,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-26 21:25:00,866 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:00,868 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:00,876 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:00,995 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:01,067 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:01,105 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:01,194 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:01,223 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:01,370 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:01,434 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:01,650 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:01,724 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:02,130 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:02,167 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:02,309 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:02,367 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:02,566 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:02,700 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:02,817 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:03,080 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:03,158 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:03,751 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:03,853 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:03,958 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:04,248 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:04,645 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:05,067 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:05,496 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:05,754 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:05,929 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:06,094 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:06,278 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:07,110 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:07,244 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:07,564 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:07,685 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:08,345 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:08,575 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:08,695 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:09,383 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:09,529 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:09,663 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:09,694 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:10,233 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:10,374 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:10,418 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:10,529 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:10,572 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:10,681 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:10,826 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:12,179 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:12,192 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:12,561 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:13,226 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:13,752 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:14,225 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:14,831 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:17,115 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:19,220 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:19,400 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:19,940 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:19,955 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:23,297 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:24,483 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:24,697 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:25,323 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:26,422 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:28,842 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:30,881 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:33,459 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:36,111 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:40,232 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:40,413 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:25:48,266 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:13,854 WARN L178 SmtUtils]: Spent 1.33 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-09-26 21:26:19,041 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,042 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,046 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,114 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,156 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,179 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,232 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,249 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,339 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,376 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,495 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,536 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,708 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,740 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,850 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:19,904 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:20,046 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:20,164 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:20,286 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:20,572 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:20,666 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:21,393 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:21,519 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:21,651 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:21,943 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:22,460 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:22,888 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:23,320 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:23,621 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:23,812 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:23,976 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:24,158 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:24,955 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:25,088 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:25,427 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:25,572 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:26,491 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:26,736 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:26,865 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:27,383 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:27,545 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:27,694 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:27,730 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:28,332 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:28,488 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:28,536 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:28,655 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:28,704 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:28,825 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:28,983 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:30,538 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:30,551 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:30,936 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:31,603 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:32,139 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:32,666 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:33,219 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:35,594 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:37,818 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:38,021 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:38,713 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:38,729 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:41,982 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:43,389 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:43,623 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:44,318 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:45,363 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:48,067 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:50,245 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:53,078 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:26:55,911 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:27:00,190 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:27:00,383 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:27:08,850 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-26 21:27:34,840 WARN L178 SmtUtils]: Spent 1.35 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-09-26 21:27:35,795 WARN L178 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-09-26 21:27:36,874 WARN L178 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 673 DAG size of output: 664 Received shutdown request... [2018-09-26 21:28:47,047 WARN L186 SmtUtils]: Removed 47 from assertion stack [2018-09-26 21:28:47,048 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-09-26 21:28:47,049 INFO L168 Benchmark]: Toolchain (without parser) took 257056.75 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 354.1 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-09-26 21:28:47,050 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:28:47,051 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:28:47,051 INFO L168 Benchmark]: Boogie Preprocessor took 22.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:28:47,052 INFO L168 Benchmark]: RCFGBuilder took 342.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:28:47,053 INFO L168 Benchmark]: TraceAbstraction took 256643.82 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 333.0 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-09-26 21:28:47,056 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 342.53 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 256643.82 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 333.0 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 1932. RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-28-47-067.csv Completed graceful shutdown