java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:38:14,699 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:38:14,701 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:38:14,719 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:38:14,719 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:38:14,721 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:38:14,722 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:38:14,725 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:38:14,727 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:38:14,728 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:38:14,729 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:38:14,762 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 20:38:14,787 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:38:14,788 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:38:14,789 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:38:14,789 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:38:14,790 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:38:14,790 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:38:14,791 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:38:14,791 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:38:14,791 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:38:14,791 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:38:14,791 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:38:14,792 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:38:14,792 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:38:14,792 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:38:14,792 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:38:14,792 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:38:14,793 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:38:14,793 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:38:14,793 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:38:14,793 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:38:14,794 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:38:14,794 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:38:14,794 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:38:14,794 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:38:14,794 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:38:14,795 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:38:14,795 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:38:14,795 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:38:14,795 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:38:14,795 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:38:14,796 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:38:14,861 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:38:14,875 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:38:14,880 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:38:14,882 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:38:14,882 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:38:14,883 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl [2018-09-30 20:38:14,883 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl' [2018-09-30 20:38:14,940 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:38:14,944 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:38:14,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:38:14,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:38:14,946 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:38:14,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:38:14" (1/1) ... [2018-09-30 20:38:14,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:38:14" (1/1) ... [2018-09-30 20:38:14,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:38:14,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:38:14,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:38:14,988 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:38:15,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:38:14" (1/1) ... [2018-09-30 20:38:15,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:38:14" (1/1) ... [2018-09-30 20:38:15,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:38:14" (1/1) ... [2018-09-30 20:38:15,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:38:14" (1/1) ... [2018-09-30 20:38:15,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:38:14" (1/1) ... [2018-09-30 20:38:15,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:38:14" (1/1) ... [2018-09-30 20:38:15,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:38:14" (1/1) ... [2018-09-30 20:38:15,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:38:15,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:38:15,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:38:15,012 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:38:15,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:38:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:38:15,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 20:38:15,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:38:15,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:38:15,244 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:38:15,245 INFO L202 PluginConnector]: Adding new model functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:38:15 BoogieIcfgContainer [2018-09-30 20:38:15,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:38:15,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:38:15,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:38:15,251 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:38:15,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:38:14" (1/2) ... [2018-09-30 20:38:15,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b7661b5 and model type functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:38:15, skipping insertion in model container [2018-09-30 20:38:15,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:38:15" (2/2) ... [2018-09-30 20:38:15,255 INFO L112 eAbstractionObserver]: Analyzing ICFG functions1.i_3.bplTransformedIcfg_BEv2_8.bpl [2018-09-30 20:38:15,264 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:38:15,276 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:38:15,335 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:38:15,336 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:38:15,336 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:38:15,336 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:38:15,336 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:38:15,336 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:38:15,337 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:38:15,337 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:38:15,337 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:38:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 20:38:15,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:38:15,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:15,364 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:38:15,365 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:15,372 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:15,372 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-30 20:38:15,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:15,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:15,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:15,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:15,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:15,542 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:38:15,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:38:15,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:38:15,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:38:15,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:15,563 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 20:38:15,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:15,686 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 20:38:15,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:38:15,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 20:38:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:15,700 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:38:15,700 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 20:38:15,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:38:15,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 20:38:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 20:38:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 20:38:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 20:38:15,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 20:38:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:15,746 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 20:38:15,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:38:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 20:38:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:38:15,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:15,747 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:38:15,747 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:15,748 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:15,748 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-09-30 20:38:15,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:15,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:15,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:15,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:15,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:15,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:15,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:15,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:15,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:15,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:15,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:38:15,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:38:15,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:38:15,952 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:15,952 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 20:38:16,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:16,040 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 20:38:16,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:38:16,042 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 20:38:16,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:16,043 INFO L225 Difference]: With dead ends: 8 [2018-09-30 20:38:16,043 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 20:38:16,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:38:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 20:38:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 20:38:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:38:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 20:38:16,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 20:38:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:16,047 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 20:38:16,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:38:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 20:38:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:38:16,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:16,048 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 20:38:16,048 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:16,049 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:16,049 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-09-30 20:38:16,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:16,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:16,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:16,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:16,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:16,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:16,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:16,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:38:16,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:38:16,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:16,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:16,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:16,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:38:16,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:38:16,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:38:16,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:16,250 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 20:38:16,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:16,366 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:38:16,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:38:16,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 20:38:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:16,368 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:38:16,368 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:38:16,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:38:16,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:38:16,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:38:16,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:38:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:38:16,371 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 20:38:16,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:16,372 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:38:16,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:38:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:38:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:38:16,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:16,373 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 20:38:16,373 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:16,373 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:16,374 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-09-30 20:38:16,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:16,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:16,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:16,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:16,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:16,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:16,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:16,615 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:38:16,637 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 20:38:16,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:16,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:16,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:16,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:38:16,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:38:16,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:38:16,701 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:16,701 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 20:38:16,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:16,810 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 20:38:16,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:38:16,811 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 20:38:16,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:16,812 INFO L225 Difference]: With dead ends: 10 [2018-09-30 20:38:16,813 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:38:16,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:38:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:38:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:38:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:38:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 20:38:16,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 20:38:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:16,817 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 20:38:16,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:38:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 20:38:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:38:16,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:16,818 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 20:38:16,818 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:16,819 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:16,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-09-30 20:38:16,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:16,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:16,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:16,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:16,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:17,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:17,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:17,033 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:38:17,061 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:38:17,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:17,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:17,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:17,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:38:17,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:38:17,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:38:17,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:17,140 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 20:38:17,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:17,224 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:38:17,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:38:17,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 20:38:17,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:17,225 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:38:17,226 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:38:17,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:38:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:38:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:38:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:38:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:38:17,229 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 20:38:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:17,229 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:38:17,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:38:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:38:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:38:17,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:17,231 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 20:38:17,231 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:17,231 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:17,231 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-09-30 20:38:17,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:17,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:17,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:17,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:17,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:17,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:17,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:17,355 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:38:17,376 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 20:38:17,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:17,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:17,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:17,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:38:17,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:38:17,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:38:17,536 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:17,536 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 20:38:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:18,017 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 20:38:18,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:38:18,022 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 20:38:18,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:18,022 INFO L225 Difference]: With dead ends: 12 [2018-09-30 20:38:18,023 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:38:18,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:38:18,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:38:18,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:38:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:38:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 20:38:18,029 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 20:38:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:18,032 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 20:38:18,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:38:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 20:38:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:38:18,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:18,033 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 20:38:18,033 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:18,033 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:18,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-09-30 20:38:18,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:18,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:18,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:18,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:18,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:18,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:18,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:18,192 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:38:18,207 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 20:38:18,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:18,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:18,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:18,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:38:18,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:38:18,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:38:18,300 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:18,300 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 20:38:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:18,427 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:38:18,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:38:18,428 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 20:38:18,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:18,428 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:38:18,428 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:38:18,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:38:18,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:38:18,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:38:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:38:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:38:18,432 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 20:38:18,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:18,433 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:38:18,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:38:18,433 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:38:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:38:18,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:18,434 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 20:38:18,434 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:18,434 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:18,434 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-09-30 20:38:18,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:18,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:18,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:18,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:18,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:18,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:18,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:18,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:18,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:18,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:18,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:38:18,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:38:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:38:18,681 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:18,681 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 20:38:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:18,834 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 20:38:18,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:38:18,834 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 20:38:18,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:18,835 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:38:18,836 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:38:18,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:38:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:38:18,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 20:38:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:38:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 20:38:18,839 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 20:38:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:18,840 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 20:38:18,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:38:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 20:38:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:38:18,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:18,841 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 20:38:18,841 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:18,841 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-09-30 20:38:18,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:18,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:18,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:18,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:18,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:18,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:18,959 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 [2018-09-30 20:38:18,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:38:18,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:38:18,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:19,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:19,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:19,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:38:19,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:38:19,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:38:19,138 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:19,138 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 20:38:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:19,277 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:38:19,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:38:19,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 20:38:19,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:19,279 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:38:19,279 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:38:19,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:38:19,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:38:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:38:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:38:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:38:19,281 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 20:38:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:19,282 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:38:19,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:38:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:38:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:38:19,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:19,283 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 20:38:19,283 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:19,283 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:19,283 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-09-30 20:38:19,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:19,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:19,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:19,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:19,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:19,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:19,443 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 [2018-09-30 20:38:19,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:38:19,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:38:19,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:19,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:19,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:19,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:38:19,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:38:19,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:38:19,622 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:19,622 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 20:38:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:19,713 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 20:38:19,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:38:19,714 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 20:38:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:19,715 INFO L225 Difference]: With dead ends: 16 [2018-09-30 20:38:19,715 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:38:19,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:38:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:38:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:38:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:38:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 20:38:19,720 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 20:38:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:19,720 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 20:38:19,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:38:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 20:38:19,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:38:19,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:19,721 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 20:38:19,721 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:19,722 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:19,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-09-30 20:38:19,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:19,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:19,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:19,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:19,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:19,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:19,923 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 [2018-09-30 20:38:19,933 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:38:19,964 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:38:19,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:19,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:20,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:20,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:38:20,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:38:20,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:38:20,098 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:20,098 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 20:38:20,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:20,190 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:38:20,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:38:20,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 20:38:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:20,197 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:38:20,198 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:38:20,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:38:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:38:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:38:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:38:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:38:20,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 20:38:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:20,201 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:38:20,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:38:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:38:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:38:20,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:20,203 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 20:38:20,203 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:20,203 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:20,203 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-09-30 20:38:20,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:20,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:20,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:20,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:20,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:20,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:20,398 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 [2018-09-30 20:38:20,405 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:38:20,431 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:38:20,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:20,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:20,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:20,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:38:20,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:38:20,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:38:20,649 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:20,649 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 20:38:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:20,779 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 20:38:20,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:38:20,780 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 20:38:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:20,781 INFO L225 Difference]: With dead ends: 18 [2018-09-30 20:38:20,781 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:38:20,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:38:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:38:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:38:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:38:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 20:38:20,785 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 20:38:20,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:20,786 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 20:38:20,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:38:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 20:38:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:38:20,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:20,787 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 20:38:20,787 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:20,787 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:20,787 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-09-30 20:38:20,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:20,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:20,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:20,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:20,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:20,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:20,902 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 [2018-09-30 20:38:20,911 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:38:20,973 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:38:20,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:20,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:21,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:21,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:38:21,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:38:21,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:38:21,106 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:21,106 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 20:38:21,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:21,225 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:38:21,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:38:21,225 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 20:38:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:21,228 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:38:21,228 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:38:21,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:38:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:38:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:38:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:38:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:38:21,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 20:38:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:21,233 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:38:21,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:38:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:38:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:38:21,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:21,234 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 20:38:21,234 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:21,234 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:21,235 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-09-30 20:38:21,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:21,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:21,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:21,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:21,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:21,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:21,612 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 [2018-09-30 20:38:21,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:21,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:21,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:21,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:38:21,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:38:21,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:38:21,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:21,759 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 20:38:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:22,022 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 20:38:22,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:38:22,023 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 20:38:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:22,024 INFO L225 Difference]: With dead ends: 20 [2018-09-30 20:38:22,024 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:38:22,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:38:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:38:22,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 20:38:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:38:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 20:38:22,028 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 20:38:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:22,028 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 20:38:22,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:38:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 20:38:22,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:38:22,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:22,029 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 20:38:22,029 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:22,029 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:22,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-09-30 20:38:22,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:22,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:22,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:22,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:22,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:22,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:22,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 20:38:22,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:38:22,231 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:38:22,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:22,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:22,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:22,353 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:38:22,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:38:22,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:38:22,354 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:22,354 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 20:38:22,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:22,552 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:38:22,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:38:22,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 20:38:22,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:22,553 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:38:22,553 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:38:22,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:38:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:38:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:38:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:38:22,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:38:22,557 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 20:38:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:22,558 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:38:22,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:38:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:38:22,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:38:22,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:22,559 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 20:38:22,559 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:22,559 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-09-30 20:38:22,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:22,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:22,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:22,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:22,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:22,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:22,983 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 [2018-09-30 20:38:22,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:38:23,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:38:23,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:23,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:23,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:23,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:38:23,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:38:23,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:38:23,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:23,394 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 20:38:23,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:23,751 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 20:38:23,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:38:23,752 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 20:38:23,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:23,752 INFO L225 Difference]: With dead ends: 22 [2018-09-30 20:38:23,753 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:38:23,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:38:23,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:38:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:38:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:38:23,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 20:38:23,757 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 20:38:23,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:23,757 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 20:38:23,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:38:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 20:38:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:38:23,758 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:23,758 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 20:38:23,758 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:23,759 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:23,759 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-09-30 20:38:23,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:23,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:23,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:23,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:23,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:23,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:23,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:23,948 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:38:23,981 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:38:23,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:23,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:24,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:24,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:38:24,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:38:24,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:38:24,153 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:24,153 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 20:38:24,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:24,320 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:38:24,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:38:24,323 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 20:38:24,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:24,323 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:38:24,324 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:38:24,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:38:24,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:38:24,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:38:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:38:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:38:24,327 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 20:38:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:24,327 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:38:24,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:38:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:38:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:38:24,328 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:24,328 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 20:38:24,329 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:24,329 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:24,329 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-09-30 20:38:24,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:24,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:24,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:24,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:24,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:24,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:24,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:24,600 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:38:24,659 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 20:38:24,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:24,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:24,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:24,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:38:24,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:38:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:38:24,791 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:24,791 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 20:38:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:24,938 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 20:38:24,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:38:24,938 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 20:38:24,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:24,939 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:38:24,939 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:38:24,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:38:24,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:38:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:38:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:38:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 20:38:24,944 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 20:38:24,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:24,944 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 20:38:24,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:38:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 20:38:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:38:24,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:24,945 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 20:38:24,945 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:24,946 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:24,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-09-30 20:38:24,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:24,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:24,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:24,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:24,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:25,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:25,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:25,205 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:38:25,240 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 20:38:25,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:25,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:25,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:25,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:38:25,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:38:25,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:38:25,542 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:25,543 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 20:38:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:26,607 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:38:26,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:38:26,608 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 20:38:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:26,608 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:38:26,609 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:38:26,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:38:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:38:26,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:38:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:38:26,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:38:26,613 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 20:38:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:26,613 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:38:26,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:38:26,613 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:38:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:38:26,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:26,614 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 20:38:26,615 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:26,616 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-09-30 20:38:26,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:26,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:26,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:26,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:26,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:26,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:26,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:26,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:27,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:27,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:27,219 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:38:27,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:38:27,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:38:27,220 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:27,220 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 20:38:27,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:27,669 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 20:38:27,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:38:27,671 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 20:38:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:27,672 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:38:27,672 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:38:27,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:38:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:38:27,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 20:38:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:38:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 20:38:27,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 20:38:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:27,677 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 20:38:27,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:38:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 20:38:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:38:27,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:27,678 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 20:38:27,678 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:27,678 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:27,678 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-09-30 20:38:27,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:27,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:27,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:27,679 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:27,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:27,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:27,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:27,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:38:27,903 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:38:27,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:27,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:28,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:28,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:38:28,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:38:28,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:38:28,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:28,024 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 20:38:28,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:28,161 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:38:28,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:38:28,162 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 20:38:28,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:28,162 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:38:28,163 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:38:28,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:38:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:38:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:38:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:38:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:38:28,166 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 20:38:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:28,166 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:38:28,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:38:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:38:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:38:28,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:28,167 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 20:38:28,167 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:28,168 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:28,168 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-09-30 20:38:28,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:28,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:28,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:28,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:28,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:28,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:28,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:28,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:38:28,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 20:38:28,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:28,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:28,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:28,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:38:28,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:38:28,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:38:28,738 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:28,738 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 20:38:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:28,895 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 20:38:28,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:38:28,897 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 20:38:28,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:28,898 INFO L225 Difference]: With dead ends: 28 [2018-09-30 20:38:28,898 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:38:28,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:38:28,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:38:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:38:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:38:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 20:38:28,901 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 20:38:28,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:28,902 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 20:38:28,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:38:28,902 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 20:38:28,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:38:28,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:28,903 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 20:38:28,903 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:28,903 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:28,903 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-09-30 20:38:28,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:28,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:28,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:28,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:28,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:29,808 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:29,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:29,817 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:38:29,854 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:38:29,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:29,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:30,016 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:30,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:30,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:38:30,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:38:30,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:38:30,039 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:30,039 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 20:38:30,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:30,196 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:38:30,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:38:30,196 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 20:38:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:30,196 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:38:30,197 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:38:30,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:38:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:38:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:38:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:38:30,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:38:30,201 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 20:38:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:30,201 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:38:30,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:38:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:38:30,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:38:30,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:30,202 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 20:38:30,202 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:30,202 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:30,203 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-09-30 20:38:30,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:30,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:30,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:30,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:30,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:30,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:30,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:30,664 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:38:30,705 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 20:38:30,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:30,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:31,035 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:31,035 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:38:31,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:38:31,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:38:31,036 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:31,036 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 20:38:31,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:31,142 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 20:38:31,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:38:31,144 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 20:38:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:31,145 INFO L225 Difference]: With dead ends: 30 [2018-09-30 20:38:31,145 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:38:31,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:38:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:38:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:38:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:38:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 20:38:31,150 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 20:38:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:31,151 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 20:38:31,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:38:31,151 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 20:38:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:38:31,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:31,151 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 20:38:31,152 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:31,152 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:31,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-09-30 20:38:31,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:31,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:31,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:31,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:31,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:31,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:31,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:31,483 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:38:31,525 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:38:31,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:31,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:31,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:31,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:38:31,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:38:31,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:38:31,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:31,623 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 20:38:31,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:31,765 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:38:31,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:38:31,766 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 20:38:31,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:31,766 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:38:31,766 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:38:31,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:38:31,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:38:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:38:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:38:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:38:31,775 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 20:38:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:31,775 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:38:31,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:38:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:38:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:38:31,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:31,777 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 20:38:31,778 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:31,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:31,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-09-30 20:38:31,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:31,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:31,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:31,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:31,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:31,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:31,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:31,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:32,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:32,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:32,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:38:32,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:38:32,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:38:32,137 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:32,137 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 20:38:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:32,307 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 20:38:32,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:38:32,308 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 20:38:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:32,309 INFO L225 Difference]: With dead ends: 32 [2018-09-30 20:38:32,309 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:38:32,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:38:32,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:38:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 20:38:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:38:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 20:38:32,312 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 20:38:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:32,312 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 20:38:32,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:38:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 20:38:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:38:32,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:32,313 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 20:38:32,313 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:32,314 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:32,314 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-09-30 20:38:32,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:32,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:32,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:32,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:32,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:32,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:32,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:32,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:38:32,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:38:32,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:32,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:32,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:32,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:38:32,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:38:32,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:38:32,755 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:32,755 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 20:38:33,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:33,015 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:38:33,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:38:33,016 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 20:38:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:33,016 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:38:33,016 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:38:33,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:38:33,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:38:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:38:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:38:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:38:33,020 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 20:38:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:33,020 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:38:33,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:38:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:38:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:38:33,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:33,021 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 20:38:33,021 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:33,021 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:33,022 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-09-30 20:38:33,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:33,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:33,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:33,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:33,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:33,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:33,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:33,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:38:33,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 20:38:33,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:33,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:33,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:33,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:38:33,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:38:33,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:38:33,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:33,416 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 20:38:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:33,594 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 20:38:33,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:38:33,594 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 20:38:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:33,595 INFO L225 Difference]: With dead ends: 34 [2018-09-30 20:38:33,595 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:38:33,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:38:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:38:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:38:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:38:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 20:38:33,600 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 20:38:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:33,600 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 20:38:33,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:38:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 20:38:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:38:33,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:33,601 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 20:38:33,601 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:33,601 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:33,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-09-30 20:38:33,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:33,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:33,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:33,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:33,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:34,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:34,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:34,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:38:34,112 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:38:34,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:34,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:34,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:34,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:38:34,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:38:34,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:38:34,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:34,280 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 20:38:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:34,426 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:38:34,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:38:34,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 20:38:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:34,427 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:38:34,427 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:38:34,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:38:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:38:34,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:38:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:38:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:38:34,432 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 20:38:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:34,432 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:38:34,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:38:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:38:34,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:38:34,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:34,433 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 20:38:34,433 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:34,433 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:34,433 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-09-30 20:38:34,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:34,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:34,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:34,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:34,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:34,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:34,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:34,783 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:38:34,842 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 20:38:34,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:34,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:34,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:34,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:38:34,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:38:34,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:38:34,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:34,966 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-30 20:38:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:35,117 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 20:38:35,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:38:35,118 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 20:38:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:35,119 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:38:35,119 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:38:35,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:38:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:38:35,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:38:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:38:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 20:38:35,123 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 20:38:35,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:35,123 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 20:38:35,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:38:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 20:38:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:38:35,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:35,124 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 20:38:35,124 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:35,124 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:35,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-09-30 20:38:35,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:35,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:35,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:35,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:35,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:35,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:35,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:35,372 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:38:35,427 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 20:38:35,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:35,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:35,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:35,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 20:38:35,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:38:35,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:38:35,548 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:35,548 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-30 20:38:35,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:35,866 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:38:35,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:38:35,870 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 20:38:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:35,871 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:38:35,871 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:38:35,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:38:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:38:35,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:38:35,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:38:35,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:38:35,875 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 20:38:35,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:35,875 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:38:35,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:38:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:38:35,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:38:35,876 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:35,876 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 20:38:35,876 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:35,877 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:35,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-09-30 20:38:35,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:35,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:35,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:35,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:35,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:36,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:36,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:36,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:36,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:36,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:36,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:38:36,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:38:36,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:38:36,457 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:36,457 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-30 20:38:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:36,633 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 20:38:36,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:38:36,633 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 20:38:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:36,634 INFO L225 Difference]: With dead ends: 38 [2018-09-30 20:38:36,634 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:38:36,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:38:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:38:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:38:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:38:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 20:38:36,640 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 20:38:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:36,640 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 20:38:36,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:38:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 20:38:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:38:36,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:36,641 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 20:38:36,642 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:36,642 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-09-30 20:38:36,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:36,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:36,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:36,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:36,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:37,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:37,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:37,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:38:37,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:38:37,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:37,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:37,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:37,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:38:37,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:38:37,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:38:37,717 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:37,717 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-30 20:38:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:38,033 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:38:38,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:38:38,034 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-30 20:38:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:38,034 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:38:38,034 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:38:38,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:38:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:38:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:38:38,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:38:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 20:38:38,038 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 20:38:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:38,038 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 20:38:38,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:38:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 20:38:38,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:38:38,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:38,039 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 20:38:38,039 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:38,039 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:38,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-09-30 20:38:38,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:38,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:38,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:38,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:38,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:38,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:38,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:38,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:38,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:38:38,339 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 20:38:38,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:38,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:38,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:38,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:38:38,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:38:38,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:38:38,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:38,470 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-30 20:38:38,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:38,604 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 20:38:38,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:38:38,604 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 20:38:38,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:38,605 INFO L225 Difference]: With dead ends: 40 [2018-09-30 20:38:38,605 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:38:38,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:38:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:38:38,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 20:38:38,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:38:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 20:38:38,608 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 20:38:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:38,609 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 20:38:38,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:38:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 20:38:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:38:38,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:38,609 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 20:38:38,609 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:38,609 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:38,609 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-09-30 20:38:38,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:38,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:38,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:38,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:38,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:38,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:38,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:38,906 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:38:38,956 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:38:38,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:38,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:39,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:39,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:38:39,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:38:39,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:38:39,256 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:39,256 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-30 20:38:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:39,482 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:38:39,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:38:39,482 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 20:38:39,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:39,483 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:38:39,483 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:38:39,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:38:39,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:38:39,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:38:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:38:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:38:39,487 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 20:38:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:39,487 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:38:39,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:38:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:38:39,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:38:39,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:39,488 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 20:38:39,488 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:39,488 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:39,488 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-09-30 20:38:39,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:39,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:39,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:39,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:39,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:39,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:39,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:39,954 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:38:40,022 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 20:38:40,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:40,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:40,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:40,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:38:40,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:38:40,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:38:40,179 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:40,180 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-30 20:38:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:40,429 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 20:38:40,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:38:40,429 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 20:38:40,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:40,430 INFO L225 Difference]: With dead ends: 42 [2018-09-30 20:38:40,430 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:38:40,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:38:40,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:38:40,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:38:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:38:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 20:38:40,433 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 20:38:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:40,433 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 20:38:40,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:38:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 20:38:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:38:40,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:40,434 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 20:38:40,434 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:40,434 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:40,435 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-09-30 20:38:40,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:40,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:40,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:40,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:40,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:40,649 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:40,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:40,658 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:38:40,737 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:38:40,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:40,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:40,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:40,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 20:38:40,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:38:40,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:38:40,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:40,972 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-30 20:38:41,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:41,205 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:38:41,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:38:41,207 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 20:38:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:41,207 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:38:41,207 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:38:41,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:38:41,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:38:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:38:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:38:41,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 20:38:41,209 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 20:38:41,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:41,210 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 20:38:41,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:38:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 20:38:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:38:41,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:41,210 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 20:38:41,211 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:41,211 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:41,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-09-30 20:38:41,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:41,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:41,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:41,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:41,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:41,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:41,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:41,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:41,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:41,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:41,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:41,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:38:41,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:38:41,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:38:41,704 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:41,704 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-30 20:38:42,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:42,004 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 20:38:42,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:38:42,005 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 20:38:42,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:42,006 INFO L225 Difference]: With dead ends: 44 [2018-09-30 20:38:42,006 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:38:42,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:38:42,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:38:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 20:38:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:38:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 20:38:42,008 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 20:38:42,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:42,009 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 20:38:42,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:38:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 20:38:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:38:42,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:42,010 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 20:38:42,010 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:42,010 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:42,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-09-30 20:38:42,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:42,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:42,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:42,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:42,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:42,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:42,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:42,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:38:42,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:38:42,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:42,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:42,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:42,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:38:42,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:38:42,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:38:42,851 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:42,852 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-30 20:38:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:43,184 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:38:43,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:38:43,185 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 20:38:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:43,185 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:38:43,186 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:38:43,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:38:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:38:43,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:38:43,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:38:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:38:43,189 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 20:38:43,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:43,190 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:38:43,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:38:43,190 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:38:43,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:38:43,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:43,190 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 20:38:43,191 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:43,191 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:43,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-09-30 20:38:43,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:43,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:43,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:43,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:43,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:43,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:43,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:43,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:38:43,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 20:38:43,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:43,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:44,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:44,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:38:44,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:38:44,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:38:44,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:44,158 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-30 20:38:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:44,365 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 20:38:44,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:38:44,365 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 20:38:44,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:44,366 INFO L225 Difference]: With dead ends: 46 [2018-09-30 20:38:44,366 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:38:44,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:38:44,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:38:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 20:38:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 20:38:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 20:38:44,369 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 20:38:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:44,369 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 20:38:44,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:38:44,370 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 20:38:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 20:38:44,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:44,370 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 20:38:44,370 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:44,370 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:44,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-09-30 20:38:44,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:44,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:44,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:44,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:44,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:45,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:45,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:45,328 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:38:45,384 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:38:45,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:45,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:45,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:45,602 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:38:45,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:38:45,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:38:45,603 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:45,603 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-30 20:38:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:45,970 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:38:45,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:38:45,971 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-30 20:38:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:45,972 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:38:45,972 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:38:45,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:38:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:38:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:38:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:38:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 20:38:45,976 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 20:38:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:45,976 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 20:38:45,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:38:45,976 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 20:38:45,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:38:45,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:45,977 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 20:38:45,977 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:45,977 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:45,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-09-30 20:38:45,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:45,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:45,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:45,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:45,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:47,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:47,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:47,451 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:38:47,530 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 20:38:47,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:47,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:47,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:47,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:38:47,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:38:47,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:38:47,686 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:47,686 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-30 20:38:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:48,185 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 20:38:48,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:38:48,185 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 20:38:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:48,186 INFO L225 Difference]: With dead ends: 48 [2018-09-30 20:38:48,186 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:38:48,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-09-30 20:38:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:38:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:38:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:38:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 20:38:48,188 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 20:38:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:48,188 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 20:38:48,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:38:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 20:38:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 20:38:48,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:48,189 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 20:38:48,189 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:48,189 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:48,189 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-09-30 20:38:48,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:48,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:48,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:48,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:48,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:48,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:48,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:48,463 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:38:48,535 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 20:38:48,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:48,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:48,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:48,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 20:38:48,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:38:48,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:38:48,884 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:48,884 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-30 20:38:49,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:49,147 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:38:49,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:38:49,147 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 20:38:49,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:49,148 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:38:49,148 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:38:49,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:38:49,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:38:49,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:38:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:38:49,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 20:38:49,151 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 20:38:49,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:49,152 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 20:38:49,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:38:49,152 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 20:38:49,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:38:49,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:49,153 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 20:38:49,153 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:49,153 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:49,153 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-09-30 20:38:49,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:49,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:49,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:49,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:49,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:49,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:49,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:49,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:49,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:49,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:49,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:38:49,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:38:49,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:38:49,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:49,883 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-30 20:38:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:50,245 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 20:38:50,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:38:50,247 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 20:38:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:50,247 INFO L225 Difference]: With dead ends: 50 [2018-09-30 20:38:50,248 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 20:38:50,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:38:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 20:38:50,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 20:38:50,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 20:38:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 20:38:50,253 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 20:38:50,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:50,254 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 20:38:50,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:38:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 20:38:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:38:50,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:50,255 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 20:38:50,255 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:50,255 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-09-30 20:38:50,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:50,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:50,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:50,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:50,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:50,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:50,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:50,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:50,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:38:50,762 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:38:50,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:50,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:50,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:50,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:38:50,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:38:50,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:38:50,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:50,892 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-30 20:38:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:51,189 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:38:51,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:38:51,189 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 20:38:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:51,190 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:38:51,190 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:38:51,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:38:51,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:38:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 20:38:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:38:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 20:38:51,191 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 20:38:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:51,192 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 20:38:51,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:38:51,192 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 20:38:51,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:38:51,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:51,192 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 20:38:51,193 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:51,193 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-09-30 20:38:51,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:51,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:51,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:51,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:51,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:51,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:51,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:51,471 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:38:51,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 20:38:51,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:51,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:51,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:51,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:38:51,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:38:51,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:38:51,817 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:51,817 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-30 20:38:52,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:52,333 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 20:38:52,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:38:52,333 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 20:38:52,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:52,334 INFO L225 Difference]: With dead ends: 52 [2018-09-30 20:38:52,334 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:38:52,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:38:52,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:38:52,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 20:38:52,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:38:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 20:38:52,337 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 20:38:52,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:52,337 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 20:38:52,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:38:52,338 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 20:38:52,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 20:38:52,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:52,338 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 20:38:52,338 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:52,338 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:52,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-09-30 20:38:52,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:52,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:52,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:52,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:52,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:52,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:52,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:52,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:38:52,787 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:38:52,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:52,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:52,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:52,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 20:38:52,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:38:52,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:38:52,983 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:52,983 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-30 20:38:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:53,441 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:38:53,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:38:53,441 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 20:38:53,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:53,442 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:38:53,442 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:38:53,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:38:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:38:53,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:38:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:38:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 20:38:53,445 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 20:38:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:53,445 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 20:38:53,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:38:53,446 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 20:38:53,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:38:53,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:53,446 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 20:38:53,446 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:53,447 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:53,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-09-30 20:38:53,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:53,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:53,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:53,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:53,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:53,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:53,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:53,877 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:38:53,975 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 20:38:53,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:53,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:54,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:54,134 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:38:54,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:38:54,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:38:54,135 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:54,135 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-30 20:38:54,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:54,394 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 20:38:54,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:38:54,395 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 20:38:54,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:54,396 INFO L225 Difference]: With dead ends: 54 [2018-09-30 20:38:54,396 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 20:38:54,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:38:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 20:38:54,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 20:38:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:38:54,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 20:38:54,399 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 20:38:54,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:54,399 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 20:38:54,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:38:54,399 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 20:38:54,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 20:38:54,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:54,400 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 20:38:54,400 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:54,400 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:54,400 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-09-30 20:38:54,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:54,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:54,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:54,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:54,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:54,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:54,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:54,725 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:38:54,815 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:38:54,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:54,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:54,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:54,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 20:38:54,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:38:54,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:38:54,957 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:54,957 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-30 20:38:55,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:55,191 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:38:55,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:38:55,191 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-30 20:38:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:55,192 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:38:55,192 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:38:55,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:38:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:38:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:38:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:38:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 20:38:55,195 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 20:38:55,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:55,196 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 20:38:55,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:38:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 20:38:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:38:55,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:55,196 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 20:38:55,197 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:55,197 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:55,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-09-30 20:38:55,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:55,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:55,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:55,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:55,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:56,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:56,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:56,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:56,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:56,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:56,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:56,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:38:56,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:38:56,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:38:56,577 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:56,577 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-30 20:38:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:56,862 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 20:38:56,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:38:56,862 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 20:38:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:56,863 INFO L225 Difference]: With dead ends: 56 [2018-09-30 20:38:56,863 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 20:38:56,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:38:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 20:38:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 20:38:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 20:38:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 20:38:56,866 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 20:38:56,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:56,866 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 20:38:56,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:38:56,866 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 20:38:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:38:56,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:56,866 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 20:38:56,866 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:56,867 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-09-30 20:38:56,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:56,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:56,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:56,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:38:56,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:57,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:57,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:57,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:38:57,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:38:57,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:57,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:57,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:57,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:38:57,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:38:57,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:38:57,609 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:57,609 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-30 20:38:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:57,881 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:38:57,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:38:57,881 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-30 20:38:57,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:57,882 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:38:57,883 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:38:57,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:38:57,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:38:57,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:38:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:38:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 20:38:57,885 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 20:38:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:57,885 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 20:38:57,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:38:57,886 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 20:38:57,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:38:57,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:57,886 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 20:38:57,886 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:57,887 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:57,887 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-09-30 20:38:57,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:57,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:57,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:57,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:57,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:58,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:58,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:58,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:38:58,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 20:38:58,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:58,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:38:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:59,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:38:59,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:38:59,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:38:59,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:38:59,151 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:38:59,151 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-30 20:38:59,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:38:59,486 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 20:38:59,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:38:59,486 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-30 20:38:59,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:38:59,487 INFO L225 Difference]: With dead ends: 58 [2018-09-30 20:38:59,487 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 20:38:59,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:38:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 20:38:59,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 20:38:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:38:59,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 20:38:59,489 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 20:38:59,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:38:59,490 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 20:38:59,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:38:59,490 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 20:38:59,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 20:38:59,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:38:59,491 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 20:38:59,491 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:38:59,491 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:38:59,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-09-30 20:38:59,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:38:59,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:38:59,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:59,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:38:59,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:38:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:38:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:38:59,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:38:59,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:38:59,820 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:38:59,894 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:38:59,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:38:59,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:00,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:00,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:39:00,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:39:00,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:39:00,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:00,108 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-30 20:39:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:00,452 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 20:39:00,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:39:00,452 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-30 20:39:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:00,453 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:39:00,453 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:39:00,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:00,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:39:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 20:39:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:39:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 20:39:00,456 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 20:39:00,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:00,457 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 20:39:00,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:39:00,457 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 20:39:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:39:00,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:00,457 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 20:39:00,457 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:00,458 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:00,458 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-09-30 20:39:00,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:00,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:00,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:00,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:00,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:00,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:00,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:00,781 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:00,898 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 20:39:00,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:00,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:01,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:01,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:39:01,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:39:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:39:01,044 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:01,044 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-30 20:39:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:01,390 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 20:39:01,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:39:01,390 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-30 20:39:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:01,391 INFO L225 Difference]: With dead ends: 60 [2018-09-30 20:39:01,391 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 20:39:01,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 20:39:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 20:39:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 20:39:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 20:39:01,393 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 20:39:01,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:01,393 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 20:39:01,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:39:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 20:39:01,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 20:39:01,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:01,394 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 20:39:01,394 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:01,395 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:01,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-09-30 20:39:01,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:01,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:01,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:01,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:01,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:01,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:01,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:01,889 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:01,999 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 20:39:01,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:02,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:02,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:02,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 20:39:02,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:39:02,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:39:02,214 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:02,214 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-30 20:39:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:02,560 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:39:02,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:39:02,561 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-30 20:39:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:02,562 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:39:02,562 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:39:02,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:39:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:39:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:39:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 20:39:02,564 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 20:39:02,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:02,564 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 20:39:02,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:39:02,565 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 20:39:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:39:02,565 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:02,565 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 20:39:02,565 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:02,565 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-09-30 20:39:02,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:02,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:02,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:02,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:02,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:02,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:02,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:02,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:02,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:03,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:03,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:39:03,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:39:03,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:39:03,136 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:03,136 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-30 20:39:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:03,695 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 20:39:03,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:39:03,695 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-30 20:39:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:03,696 INFO L225 Difference]: With dead ends: 62 [2018-09-30 20:39:03,696 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 20:39:03,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:03,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 20:39:03,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 20:39:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 20:39:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 20:39:03,699 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 20:39:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:03,699 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 20:39:03,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:39:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 20:39:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 20:39:03,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:03,699 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 20:39:03,700 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:03,700 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:03,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-09-30 20:39:03,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:03,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:03,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:03,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:03,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:04,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:04,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:04,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:04,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:04,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:04,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:04,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:04,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:39:04,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:39:04,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:39:04,270 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:04,270 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-30 20:39:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:04,600 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 20:39:04,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:39:04,601 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-30 20:39:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:04,602 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:39:04,602 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:39:04,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:04,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:39:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:39:04,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:39:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 20:39:04,604 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 20:39:04,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:04,605 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 20:39:04,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:39:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 20:39:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:39:04,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:04,605 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 20:39:04,606 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:04,606 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:04,606 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-09-30 20:39:04,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:04,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:04,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:04,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:04,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:04,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:04,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:04,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:05,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 20:39:05,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:05,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:05,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:05,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 20:39:05,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:39:05,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:39:05,296 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:05,296 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-30 20:39:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:05,664 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 20:39:05,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:39:05,665 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-30 20:39:05,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:05,666 INFO L225 Difference]: With dead ends: 64 [2018-09-30 20:39:05,666 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 20:39:05,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:05,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 20:39:05,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 20:39:05,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 20:39:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 20:39:05,668 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 20:39:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:05,668 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 20:39:05,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:39:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 20:39:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 20:39:05,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:05,669 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 20:39:05,669 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:05,669 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:05,669 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-09-30 20:39:05,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:05,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:05,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:05,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:05,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:05,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:05,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:06,000 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:06,080 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:06,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:06,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:06,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:06,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 20:39:06,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:39:06,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:39:06,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:06,289 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-30 20:39:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:06,691 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:39:06,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:39:06,692 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-30 20:39:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:06,693 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:39:06,693 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:39:06,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:39:06,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 20:39:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:39:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 20:39:06,696 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 20:39:06,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:06,697 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 20:39:06,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:39:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 20:39:06,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:39:06,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:06,697 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 20:39:06,698 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:06,698 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:06,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-09-30 20:39:06,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:06,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:06,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:06,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:06,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:07,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:07,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:07,271 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:07,413 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 20:39:07,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:07,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:07,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:07,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 20:39:07,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:39:07,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:39:07,688 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:07,688 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-30 20:39:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:08,091 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 20:39:08,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:39:08,092 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-30 20:39:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:08,093 INFO L225 Difference]: With dead ends: 66 [2018-09-30 20:39:08,093 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 20:39:08,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:39:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 20:39:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 20:39:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 20:39:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 20:39:08,095 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 20:39:08,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:08,095 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 20:39:08,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:39:08,095 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 20:39:08,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 20:39:08,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:08,095 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 20:39:08,096 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:08,096 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:08,096 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-09-30 20:39:08,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:08,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:08,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:08,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:08,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:08,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:08,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:08,632 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:08,758 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:39:08,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:08,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:08,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:08,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 20:39:08,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:39:08,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:39:08,934 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:08,934 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-30 20:39:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:09,285 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 20:39:09,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:39:09,286 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-30 20:39:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:09,287 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:39:09,287 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 20:39:09,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 20:39:09,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 20:39:09,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:39:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 20:39:09,288 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 20:39:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:09,289 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 20:39:09,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:39:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 20:39:09,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 20:39:09,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:09,289 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 20:39:09,289 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:09,289 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:09,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-09-30 20:39:09,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:09,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:09,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:09,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:09,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:09,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:09,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:09,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:09,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:09,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:09,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 20:39:09,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:39:09,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:39:09,934 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:09,934 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-30 20:39:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:10,248 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 20:39:10,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:39:10,249 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-30 20:39:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:10,249 INFO L225 Difference]: With dead ends: 68 [2018-09-30 20:39:10,250 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 20:39:10,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:10,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 20:39:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 20:39:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:39:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 20:39:10,251 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 20:39:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:10,252 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 20:39:10,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:39:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 20:39:10,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:39:10,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:10,252 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 20:39:10,252 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:10,252 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:10,252 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-09-30 20:39:10,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:10,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:10,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:10,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:10,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:10,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:10,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:10,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:10,690 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:10,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:10,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:10,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:10,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 20:39:10,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:39:10,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:39:10,875 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:10,875 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-30 20:39:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:11,299 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 20:39:11,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:39:11,299 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-30 20:39:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:11,300 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:39:11,300 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:39:11,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:39:11,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:39:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:39:11,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:39:11,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 20:39:11,302 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 20:39:11,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:11,303 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 20:39:11,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:39:11,303 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 20:39:11,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:39:11,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:11,303 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 20:39:11,303 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:11,303 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:11,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-09-30 20:39:11,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:11,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:11,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:11,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:11,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:11,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:11,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:11,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:11,880 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 20:39:11,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:11,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:12,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:12,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 20:39:12,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:39:12,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:39:12,186 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:12,186 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-30 20:39:12,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:12,656 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 20:39:12,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:39:12,657 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-30 20:39:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:12,657 INFO L225 Difference]: With dead ends: 70 [2018-09-30 20:39:12,657 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:39:12,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:12,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:39:12,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 20:39:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 20:39:12,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 20:39:12,660 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 20:39:12,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:12,660 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 20:39:12,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:39:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 20:39:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 20:39:12,661 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:12,661 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 20:39:12,661 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:12,661 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-09-30 20:39:12,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:12,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:12,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:12,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:12,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:13,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:13,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:13,145 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:13,242 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:13,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:13,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:13,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:13,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 20:39:13,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:39:13,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:39:13,480 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:13,480 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-30 20:39:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:14,017 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 20:39:14,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:39:14,017 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-30 20:39:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:14,018 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:39:14,018 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:39:14,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:39:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 20:39:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 20:39:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 20:39:14,020 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 20:39:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:14,020 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 20:39:14,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:39:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 20:39:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:39:14,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:14,021 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 20:39:14,021 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:14,021 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:14,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-09-30 20:39:14,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:14,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:14,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:14,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:14,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:14,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:14,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:14,967 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:15,116 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 20:39:15,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:15,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:15,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:15,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 20:39:15,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:39:15,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:39:15,429 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:15,429 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-30 20:39:15,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:15,857 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 20:39:15,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:39:15,857 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-30 20:39:15,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:15,858 INFO L225 Difference]: With dead ends: 72 [2018-09-30 20:39:15,858 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 20:39:15,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:39:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 20:39:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 20:39:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:39:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 20:39:15,860 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 20:39:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:15,860 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 20:39:15,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:39:15,860 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 20:39:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 20:39:15,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:15,860 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-30 20:39:15,861 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:15,861 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-09-30 20:39:15,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:15,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:15,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:15,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:15,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:16,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:16,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:16,349 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:16,488 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 20:39:16,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:16,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:18,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:18,613 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 20:39:18,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:39:18,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:39:18,613 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:18,614 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-30 20:39:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:18,900 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 20:39:18,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:39:18,900 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-30 20:39:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:18,901 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:39:18,901 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:39:18,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-09-30 20:39:18,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:39:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 20:39:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 20:39:18,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 20:39:18,904 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 20:39:18,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:18,904 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 20:39:18,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:39:18,904 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 20:39:18,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 20:39:18,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:18,905 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 20:39:18,905 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:18,905 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:18,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-09-30 20:39:18,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:18,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:18,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:18,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:18,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:19,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:19,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:19,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:19,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:19,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:19,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 20:39:19,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:39:19,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:39:19,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:19,556 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-30 20:39:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:20,005 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 20:39:20,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:39:20,005 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-30 20:39:20,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:20,006 INFO L225 Difference]: With dead ends: 74 [2018-09-30 20:39:20,006 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 20:39:20,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:20,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 20:39:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 20:39:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 20:39:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 20:39:20,008 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 20:39:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:20,008 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 20:39:20,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:39:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 20:39:20,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 20:39:20,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:20,009 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-30 20:39:20,009 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:20,009 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:20,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-09-30 20:39:20,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:20,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:20,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:20,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:20,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:20,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:20,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:20,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:20,687 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:20,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:20,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:21,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:21,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 20:39:21,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:39:21,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:39:21,049 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:21,049 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-30 20:39:21,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:21,365 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 20:39:21,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:39:21,365 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-30 20:39:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:21,366 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:39:21,366 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 20:39:21,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:39:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 20:39:21,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 20:39:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:39:21,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 20:39:21,370 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 20:39:21,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:21,370 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 20:39:21,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:39:21,370 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 20:39:21,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:39:21,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:21,371 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 20:39:21,371 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:21,371 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:21,372 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-09-30 20:39:21,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:21,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:21,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:21,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:21,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:21,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:21,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:21,773 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:21,965 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 20:39:21,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:21,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:22,145 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:22,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 20:39:22,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:39:22,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:39:22,146 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:22,146 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-30 20:39:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:22,627 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 20:39:22,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:39:22,628 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-30 20:39:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:22,628 INFO L225 Difference]: With dead ends: 76 [2018-09-30 20:39:22,628 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:39:22,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:39:22,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:39:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 20:39:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 20:39:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 20:39:22,631 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 20:39:22,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:22,631 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 20:39:22,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:39:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 20:39:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 20:39:22,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:22,632 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-30 20:39:22,632 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:22,632 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:22,633 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-09-30 20:39:22,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:22,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:22,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:22,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:22,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:23,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:23,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:23,154 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:23,261 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:23,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:23,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:23,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:23,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 20:39:23,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:39:23,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:39:23,467 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:23,467 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-30 20:39:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:24,107 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 20:39:24,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:39:24,108 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-30 20:39:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:24,109 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:39:24,109 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:39:24,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:39:24,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:39:24,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:39:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 20:39:24,113 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 20:39:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:24,113 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 20:39:24,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:39:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 20:39:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:39:24,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:24,114 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 20:39:24,114 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:24,114 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-09-30 20:39:24,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:24,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:24,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:24,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:24,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:24,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:24,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:24,757 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:24,948 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 20:39:24,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:24,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:25,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:25,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 20:39:25,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:39:25,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:39:25,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:25,249 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-30 20:39:25,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:25,761 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 20:39:25,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:39:25,761 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-30 20:39:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:25,762 INFO L225 Difference]: With dead ends: 78 [2018-09-30 20:39:25,762 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 20:39:25,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:39:25,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 20:39:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 20:39:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 20:39:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 20:39:25,765 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 20:39:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:25,766 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 20:39:25,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:39:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 20:39:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 20:39:25,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:25,767 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-30 20:39:25,767 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:25,767 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:25,767 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-09-30 20:39:25,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:25,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:25,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:25,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:25,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:26,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:26,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:26,309 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:26,527 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:39:26,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:26,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:26,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:26,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 20:39:26,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:39:26,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:39:26,744 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:26,744 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-30 20:39:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:27,254 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 20:39:27,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:39:27,254 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-30 20:39:27,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:27,255 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:39:27,255 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:39:27,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:27,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:39:27,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 20:39:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:39:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 20:39:27,258 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 20:39:27,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:27,258 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 20:39:27,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:39:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 20:39:27,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:39:27,259 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:27,259 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 20:39:27,260 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:27,260 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:27,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1560746476, now seen corresponding path program 73 times [2018-09-30 20:39:27,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:27,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:27,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:27,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:27,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:28,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:28,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:28,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:28,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:28,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:28,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 20:39:28,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:39:28,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:39:28,691 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:28,691 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-30 20:39:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:29,449 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 20:39:29,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:39:29,450 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-30 20:39:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:29,450 INFO L225 Difference]: With dead ends: 80 [2018-09-30 20:39:29,450 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 20:39:29,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:39:29,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 20:39:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 20:39:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 20:39:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 20:39:29,453 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 20:39:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:29,453 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 20:39:29,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:39:29,453 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 20:39:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 20:39:29,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:29,453 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-30 20:39:29,454 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:29,454 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:29,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1138502307, now seen corresponding path program 74 times [2018-09-30 20:39:29,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:29,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:29,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:29,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:29,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:29,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:29,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:29,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:29,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:29,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:30,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:30,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:30,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 20:39:30,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:39:30,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:39:30,246 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:30,246 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-30 20:39:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:30,767 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 20:39:30,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:39:30,767 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-30 20:39:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:30,768 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:39:30,768 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:39:30,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:39:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 20:39:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 20:39:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 20:39:30,770 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 20:39:30,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:30,771 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 20:39:30,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:39:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 20:39:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:39:30,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:30,772 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 20:39:30,772 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:30,772 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:30,772 INFO L82 PathProgramCache]: Analyzing trace with hash 933834956, now seen corresponding path program 75 times [2018-09-30 20:39:30,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:30,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:30,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:30,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:30,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:31,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:31,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:31,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:31,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 20:39:31,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:31,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:31,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:31,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 20:39:31,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:39:31,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:39:31,625 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:31,625 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-30 20:39:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:32,236 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 20:39:32,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:39:32,236 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-30 20:39:32,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:32,237 INFO L225 Difference]: With dead ends: 82 [2018-09-30 20:39:32,237 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 20:39:32,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:32,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 20:39:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 20:39:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:39:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 20:39:32,239 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 20:39:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:32,239 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 20:39:32,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:39:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 20:39:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 20:39:32,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:32,240 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-30 20:39:32,240 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:32,240 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:32,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1115885629, now seen corresponding path program 76 times [2018-09-30 20:39:32,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:32,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:32,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:32,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:32,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:32,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:32,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:32,744 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:32,852 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:32,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:32,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:33,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:33,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 20:39:33,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 20:39:33,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 20:39:33,065 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:33,065 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-30 20:39:34,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:34,566 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 20:39:34,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:39:34,566 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-30 20:39:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:34,566 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:39:34,567 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 20:39:34,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 20:39:34,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 20:39:34,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 20:39:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 20:39:34,569 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 20:39:34,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:34,569 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 20:39:34,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 20:39:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 20:39:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:39:34,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:34,570 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-30 20:39:34,570 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:34,570 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash -232714324, now seen corresponding path program 77 times [2018-09-30 20:39:34,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:34,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:34,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:34,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:34,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:35,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:35,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:35,041 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:35,245 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 20:39:35,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:35,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:35,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:35,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 20:39:35,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:39:35,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:39:35,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:35,966 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-30 20:39:36,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:36,513 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 20:39:36,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:39:36,513 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-30 20:39:36,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:36,514 INFO L225 Difference]: With dead ends: 84 [2018-09-30 20:39:36,514 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:39:36,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:39:36,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:39:36,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 20:39:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 20:39:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 20:39:36,516 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 20:39:36,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:36,516 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 20:39:36,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:39:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 20:39:36,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 20:39:36,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:36,517 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-30 20:39:36,517 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:36,518 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:36,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1375792355, now seen corresponding path program 78 times [2018-09-30 20:39:36,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:36,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:36,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:36,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:36,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:36,978 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:36,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:36,985 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:37,176 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 20:39:37,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:37,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:37,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:37,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 20:39:37,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 20:39:37,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 20:39:37,391 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:37,391 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-30 20:39:37,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:37,758 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 20:39:37,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:39:37,759 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-30 20:39:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:37,759 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:39:37,759 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:39:37,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:39:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:39:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:39:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 20:39:37,762 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 20:39:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:37,763 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 20:39:37,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 20:39:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 20:39:37,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:39:37,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:37,764 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-30 20:39:37,764 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:37,764 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:37,764 INFO L82 PathProgramCache]: Analyzing trace with hash -300108148, now seen corresponding path program 79 times [2018-09-30 20:39:37,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:37,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:37,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:37,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:37,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:38,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:38,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:38,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:38,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:38,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:38,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 20:39:38,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:39:38,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:39:38,552 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:38,552 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-30 20:39:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:39,128 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 20:39:39,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:39:39,128 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-30 20:39:39,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:39,129 INFO L225 Difference]: With dead ends: 86 [2018-09-30 20:39:39,129 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 20:39:39,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:39,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 20:39:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 20:39:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 20:39:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 20:39:39,132 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 20:39:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:39,133 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 20:39:39,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:39:39,133 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 20:39:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:39:39,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:39,134 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-30 20:39:39,134 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:39,134 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:39,134 INFO L82 PathProgramCache]: Analyzing trace with hash -713416189, now seen corresponding path program 80 times [2018-09-30 20:39:39,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:39,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:39,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:39,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:39,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:39,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:39,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:39,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:39,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:39,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:39,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:39,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:40,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:40,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 20:39:40,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:39:40,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:39:40,551 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:40,551 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-30 20:39:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:41,116 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 20:39:41,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:39:41,117 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-30 20:39:41,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:41,117 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:39:41,117 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 20:39:41,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:39:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 20:39:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 20:39:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:39:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 20:39:41,120 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 20:39:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:41,121 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 20:39:41,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:39:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 20:39:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 20:39:41,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:41,122 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-30 20:39:41,122 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:41,122 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:41,123 INFO L82 PathProgramCache]: Analyzing trace with hash -641063572, now seen corresponding path program 81 times [2018-09-30 20:39:41,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:41,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:41,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:41,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:41,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:41,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:41,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:41,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:41,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 20:39:41,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:41,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:42,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:42,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 20:39:42,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:39:42,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:39:42,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:42,069 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-30 20:39:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:42,552 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 20:39:42,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 20:39:42,552 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-30 20:39:42,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:42,553 INFO L225 Difference]: With dead ends: 88 [2018-09-30 20:39:42,553 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 20:39:42,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 20:39:42,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 20:39:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 20:39:42,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 20:39:42,555 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 20:39:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:42,555 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 20:39:42,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:39:42,555 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 20:39:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 20:39:42,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:42,556 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-30 20:39:42,556 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:42,556 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:42,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1601867555, now seen corresponding path program 82 times [2018-09-30 20:39:42,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:42,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:42,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:42,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:42,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:43,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:43,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:43,059 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:43,175 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:43,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:43,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:43,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:43,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 20:39:43,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 20:39:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 20:39:43,419 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:43,419 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-30 20:39:44,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:44,292 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 20:39:44,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 20:39:44,293 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-30 20:39:44,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:44,293 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:39:44,293 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 20:39:44,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 20:39:44,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 20:39:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 20:39:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 20:39:44,295 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 20:39:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:44,295 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 20:39:44,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 20:39:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 20:39:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:39:44,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:44,296 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-30 20:39:44,296 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:44,296 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:44,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1881711540, now seen corresponding path program 83 times [2018-09-30 20:39:44,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:44,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:44,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:44,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:44,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:44,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:44,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:44,879 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:45,096 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 20:39:45,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:45,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:45,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:45,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 20:39:45,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:39:45,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:39:45,369 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:45,369 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-30 20:39:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:45,986 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-30 20:39:45,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:39:45,986 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-30 20:39:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:45,987 INFO L225 Difference]: With dead ends: 90 [2018-09-30 20:39:45,987 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 20:39:45,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:39:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 20:39:45,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 20:39:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 20:39:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 20:39:45,989 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-30 20:39:45,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:45,989 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 20:39:45,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:39:45,989 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 20:39:45,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 20:39:45,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:45,989 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-30 20:39:45,990 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:45,990 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:45,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1796486211, now seen corresponding path program 84 times [2018-09-30 20:39:45,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:45,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:45,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:45,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:45,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:46,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:46,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:46,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:46,496 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:46,708 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:39:46,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:46,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:46,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:46,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 20:39:46,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 20:39:46,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 20:39:46,934 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:46,934 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-30 20:39:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:47,427 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 20:39:47,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 20:39:47,428 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-30 20:39:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:47,428 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:39:47,428 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 20:39:47,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:39:47,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 20:39:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 20:39:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 20:39:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 20:39:47,431 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-30 20:39:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:47,431 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 20:39:47,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 20:39:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 20:39:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 20:39:47,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:47,432 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-30 20:39:47,432 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:47,432 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash -143500500, now seen corresponding path program 85 times [2018-09-30 20:39:47,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:47,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:47,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:47,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:47,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:48,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:48,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:48,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:48,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:48,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:48,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 20:39:48,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 20:39:48,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 20:39:48,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:48,769 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-30 20:39:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:49,167 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-30 20:39:49,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 20:39:49,168 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-30 20:39:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:49,168 INFO L225 Difference]: With dead ends: 92 [2018-09-30 20:39:49,168 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 20:39:49,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:39:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 20:39:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 20:39:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 20:39:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 20:39:49,171 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-30 20:39:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:49,171 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 20:39:49,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 20:39:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 20:39:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 20:39:49,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:49,172 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-30 20:39:49,173 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:49,173 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash -153546397, now seen corresponding path program 86 times [2018-09-30 20:39:49,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:49,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:49,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:49,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:49,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:49,860 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:49,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:49,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:49,990 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:49,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:49,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:50,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:50,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 20:39:50,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 20:39:50,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 20:39:50,214 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:50,214 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-30 20:39:50,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:50,598 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 20:39:50,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:39:50,598 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-30 20:39:50,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:50,599 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:39:50,599 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:39:50,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:39:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:39:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:39:50,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:39:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 20:39:50,602 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-30 20:39:50,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:50,602 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 20:39:50,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 20:39:50,602 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 20:39:50,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:39:50,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:50,603 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-30 20:39:50,603 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:50,603 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:50,603 INFO L82 PathProgramCache]: Analyzing trace with hash -464969204, now seen corresponding path program 87 times [2018-09-30 20:39:50,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:50,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:50,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:50,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:50,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:51,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:51,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:51,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:39:51,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 20:39:51,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:51,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:51,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:51,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 20:39:51,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:39:51,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:39:51,634 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:51,634 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-30 20:39:52,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:52,028 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-30 20:39:52,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 20:39:52,028 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-30 20:39:52,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:52,029 INFO L225 Difference]: With dead ends: 94 [2018-09-30 20:39:52,029 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 20:39:52,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:39:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 20:39:52,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 20:39:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 20:39:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 20:39:52,031 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-30 20:39:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:52,031 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 20:39:52,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:39:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 20:39:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 20:39:52,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:52,032 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-30 20:39:52,032 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:52,032 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:52,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1529141629, now seen corresponding path program 88 times [2018-09-30 20:39:52,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:52,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:52,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:52,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:52,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:52,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:52,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:52,582 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:39:52,709 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:39:52,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:52,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:52,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:52,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 20:39:52,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 20:39:52,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 20:39:52,957 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:52,957 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-30 20:39:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:53,391 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 20:39:53,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 20:39:53,391 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-30 20:39:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:53,392 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:39:53,392 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 20:39:53,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:39:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 20:39:53,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 20:39:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 20:39:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 20:39:53,394 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-30 20:39:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:53,394 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 20:39:53,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 20:39:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 20:39:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:39:53,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:53,395 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-30 20:39:53,395 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:53,395 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:53,395 INFO L82 PathProgramCache]: Analyzing trace with hash -158748436, now seen corresponding path program 89 times [2018-09-30 20:39:53,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:53,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:53,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:53,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:53,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:53,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:53,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:53,955 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:39:54,213 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 20:39:54,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:54,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:54,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:54,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 20:39:54,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 20:39:54,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 20:39:54,509 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:54,509 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-30 20:39:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:55,070 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-30 20:39:55,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 20:39:55,071 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-30 20:39:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:55,071 INFO L225 Difference]: With dead ends: 96 [2018-09-30 20:39:55,072 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:39:55,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:39:55,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:39:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 20:39:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:39:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 20:39:55,074 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-30 20:39:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:55,074 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 20:39:55,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 20:39:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 20:39:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 20:39:55,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:55,075 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-30 20:39:55,076 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:55,076 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:55,076 INFO L82 PathProgramCache]: Analyzing trace with hash -626232413, now seen corresponding path program 90 times [2018-09-30 20:39:55,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:55,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:55,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:55,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:55,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:55,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:55,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:55,642 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:39:55,880 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 20:39:55,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:55,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:56,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:56,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 20:39:56,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 20:39:56,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 20:39:56,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:56,163 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-30 20:39:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:56,725 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 20:39:56,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:39:56,725 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-30 20:39:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:56,726 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:39:56,726 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 20:39:56,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:39:56,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 20:39:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 20:39:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 20:39:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 20:39:56,728 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-30 20:39:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:56,728 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 20:39:56,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 20:39:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 20:39:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 20:39:56,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:56,729 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-30 20:39:56,729 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:56,729 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2061633484, now seen corresponding path program 91 times [2018-09-30 20:39:56,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:56,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:56,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:56,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:39:56,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:57,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:57,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:57,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:57,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:57,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:57,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 20:39:57,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:39:57,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:39:57,674 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:57,674 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-30 20:39:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:39:58,408 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-30 20:39:58,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 20:39:58,408 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-30 20:39:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:39:58,408 INFO L225 Difference]: With dead ends: 98 [2018-09-30 20:39:58,409 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 20:39:58,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:39:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 20:39:58,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 20:39:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 20:39:58,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 20:39:58,411 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-30 20:39:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:39:58,411 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 20:39:58,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:39:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 20:39:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 20:39:58,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:39:58,412 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-30 20:39:58,412 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:39:58,412 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:39:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash -513869629, now seen corresponding path program 92 times [2018-09-30 20:39:58,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:39:58,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:39:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:58,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:39:58,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:39:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:39:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:59,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:39:59,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:39:59,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:39:59,170 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:39:59,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:39:59,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:39:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:39:59,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:39:59,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 20:39:59,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 20:39:59,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 20:39:59,421 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:39:59,422 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-30 20:40:00,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:00,017 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 20:40:00,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 20:40:00,018 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-30 20:40:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:00,019 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:40:00,019 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 20:40:00,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:00,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 20:40:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 20:40:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 20:40:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 20:40:00,021 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-30 20:40:00,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:00,021 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 20:40:00,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 20:40:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 20:40:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 20:40:00,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:00,022 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-30 20:40:00,022 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:00,022 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:00,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1249912492, now seen corresponding path program 93 times [2018-09-30 20:40:00,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:00,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:00,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:00,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:00,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:00,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:00,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:00,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:00,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 20:40:00,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:00,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:01,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:01,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 20:40:01,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:40:01,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:40:01,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:01,140 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-30 20:40:01,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:01,724 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-30 20:40:01,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:40:01,725 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-30 20:40:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:01,725 INFO L225 Difference]: With dead ends: 100 [2018-09-30 20:40:01,725 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 20:40:01,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:01,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 20:40:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 20:40:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 20:40:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 20:40:01,727 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-30 20:40:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:01,728 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 20:40:01,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:40:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 20:40:01,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 20:40:01,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:01,728 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-30 20:40:01,728 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:01,729 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash 92583395, now seen corresponding path program 94 times [2018-09-30 20:40:01,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:01,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:01,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:01,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:01,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:02,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:02,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:02,298 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:02,435 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:02,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:02,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:02,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:02,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 20:40:02,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 20:40:02,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 20:40:02,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:02,693 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-30 20:40:03,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:03,154 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 20:40:03,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 20:40:03,154 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-30 20:40:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:03,155 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:40:03,155 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:40:03,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:40:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 20:40:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 20:40:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 20:40:03,157 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-30 20:40:03,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:03,157 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 20:40:03,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 20:40:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 20:40:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:40:03,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:03,158 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-30 20:40:03,158 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:03,159 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:03,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1424880244, now seen corresponding path program 95 times [2018-09-30 20:40:03,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:03,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:03,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:03,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:03,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:03,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:03,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:03,765 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:04,044 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 20:40:04,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:04,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:04,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:04,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 20:40:04,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 20:40:04,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 20:40:04,306 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:04,306 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-30 20:40:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:05,144 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-30 20:40:05,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 20:40:05,145 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-30 20:40:05,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:05,145 INFO L225 Difference]: With dead ends: 102 [2018-09-30 20:40:05,145 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 20:40:05,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 20:40:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 20:40:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:40:05,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 20:40:05,148 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-30 20:40:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:05,148 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 20:40:05,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 20:40:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 20:40:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 20:40:05,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:05,149 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-30 20:40:05,149 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:05,149 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:05,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1221612797, now seen corresponding path program 96 times [2018-09-30 20:40:05,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:05,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:05,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:05,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:05,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:05,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:05,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:05,809 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:06,074 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:40:06,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:06,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:06,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:06,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 20:40:06,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 20:40:06,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 20:40:06,349 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:06,349 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-30 20:40:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:06,843 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 20:40:06,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 20:40:06,844 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-30 20:40:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:06,845 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:40:06,845 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:40:06,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:06,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:40:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:40:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:40:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 20:40:06,848 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-30 20:40:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:06,848 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 20:40:06,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 20:40:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 20:40:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:40:06,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:06,849 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-30 20:40:06,849 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:06,849 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash 784710764, now seen corresponding path program 97 times [2018-09-30 20:40:06,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:06,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:06,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:06,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:06,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:07,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:07,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:07,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:07,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:07,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:07,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 20:40:07,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 20:40:07,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 20:40:07,863 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:07,863 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-30 20:40:08,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:08,372 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 20:40:08,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 20:40:08,372 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-30 20:40:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:08,373 INFO L225 Difference]: With dead ends: 104 [2018-09-30 20:40:08,373 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 20:40:08,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:08,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 20:40:08,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 20:40:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 20:40:08,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 20:40:08,375 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-30 20:40:08,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:08,376 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 20:40:08,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 20:40:08,376 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 20:40:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 20:40:08,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:08,376 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-30 20:40:08,376 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:08,376 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1443768285, now seen corresponding path program 98 times [2018-09-30 20:40:08,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:08,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:08,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:08,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:08,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:08,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:08,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:09,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:09,146 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:09,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:09,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:09,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:09,418 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 20:40:09,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 20:40:09,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 20:40:09,419 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:09,419 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-30 20:40:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:10,385 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 20:40:10,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 20:40:10,386 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-30 20:40:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:10,386 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:40:10,386 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 20:40:10,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 20:40:10,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 20:40:10,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 20:40:10,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 20:40:10,389 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-30 20:40:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:10,389 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 20:40:10,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 20:40:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 20:40:10,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 20:40:10,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:10,390 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-30 20:40:10,390 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:10,390 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:10,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1807142068, now seen corresponding path program 99 times [2018-09-30 20:40:10,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:10,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:10,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:10,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:10,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:11,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:11,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:11,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:11,351 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 20:40:11,351 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:11,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:11,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:11,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 20:40:11,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:40:11,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:40:11,621 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:11,622 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-30 20:40:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:12,417 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-30 20:40:12,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 20:40:12,417 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-30 20:40:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:12,418 INFO L225 Difference]: With dead ends: 106 [2018-09-30 20:40:12,418 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 20:40:12,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 20:40:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 20:40:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 20:40:12,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 20:40:12,421 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-30 20:40:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:12,421 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 20:40:12,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:40:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 20:40:12,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 20:40:12,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:12,422 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-30 20:40:12,422 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:12,422 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:12,422 INFO L82 PathProgramCache]: Analyzing trace with hash -186827453, now seen corresponding path program 100 times [2018-09-30 20:40:12,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:12,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:12,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:12,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:12,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:13,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:13,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:13,083 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:13,226 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:13,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:13,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:13,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:13,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 20:40:13,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 20:40:13,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 20:40:13,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:13,493 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-30 20:40:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:14,289 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 20:40:14,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 20:40:14,289 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-30 20:40:14,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:14,290 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:40:14,290 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 20:40:14,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 20:40:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 20:40:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:40:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 20:40:14,300 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-30 20:40:14,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:14,300 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 20:40:14,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 20:40:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 20:40:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:40:14,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:14,301 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-30 20:40:14,301 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:14,301 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:14,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1496681940, now seen corresponding path program 101 times [2018-09-30 20:40:14,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:14,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:14,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:14,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:14,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:15,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:15,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:15,186 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:15,477 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 20:40:15,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:15,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:15,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:15,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 20:40:15,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 20:40:15,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 20:40:15,822 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:15,822 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-30 20:40:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:16,619 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-30 20:40:16,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 20:40:16,619 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-30 20:40:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:16,620 INFO L225 Difference]: With dead ends: 108 [2018-09-30 20:40:16,620 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:40:16,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:40:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:40:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 20:40:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 20:40:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 20:40:16,631 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-30 20:40:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:16,631 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 20:40:16,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 20:40:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 20:40:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 20:40:16,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:16,632 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-30 20:40:16,632 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:16,634 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:16,635 INFO L82 PathProgramCache]: Analyzing trace with hash 847501923, now seen corresponding path program 102 times [2018-09-30 20:40:16,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:16,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:16,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:16,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:16,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:17,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:17,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:17,296 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:17,593 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 20:40:17,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:17,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:17,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:17,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 20:40:17,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 20:40:17,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 20:40:17,863 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:17,863 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-30 20:40:18,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:18,688 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 20:40:18,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 20:40:18,689 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-30 20:40:18,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:18,689 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:40:18,689 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 20:40:18,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 20:40:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 20:40:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 20:40:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 20:40:18,692 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-30 20:40:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:18,692 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 20:40:18,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 20:40:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 20:40:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 20:40:18,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:18,693 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-30 20:40:18,693 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:18,693 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:18,693 INFO L82 PathProgramCache]: Analyzing trace with hash 502757644, now seen corresponding path program 103 times [2018-09-30 20:40:18,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:18,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:18,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:18,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:18,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:19,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:19,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:19,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:19,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:19,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:19,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 20:40:19,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:40:19,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:40:19,906 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:19,906 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-30 20:40:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:20,594 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-30 20:40:20,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 20:40:20,594 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-30 20:40:20,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:20,595 INFO L225 Difference]: With dead ends: 110 [2018-09-30 20:40:20,595 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 20:40:20,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 20:40:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 20:40:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 20:40:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 20:40:20,597 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-30 20:40:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:20,597 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 20:40:20,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:40:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 20:40:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:40:20,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:20,598 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-30 20:40:20,598 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:20,598 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:20,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1594380413, now seen corresponding path program 104 times [2018-09-30 20:40:20,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:20,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:20,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:20,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:20,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:21,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:21,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:21,269 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:21,420 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:21,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:21,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:21,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:21,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 20:40:21,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 20:40:21,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 20:40:21,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:21,702 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-30 20:40:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:22,325 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 20:40:22,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 20:40:22,325 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-30 20:40:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:22,326 INFO L225 Difference]: With dead ends: 111 [2018-09-30 20:40:22,326 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 20:40:22,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 20:40:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 20:40:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 20:40:22,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 20:40:22,328 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-30 20:40:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:22,329 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 20:40:22,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 20:40:22,329 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 20:40:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 20:40:22,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:22,329 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-30 20:40:22,330 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:22,330 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:22,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2113816556, now seen corresponding path program 105 times [2018-09-30 20:40:22,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:22,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:22,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:22,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:22,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:23,070 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:23,070 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:23,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:23,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 20:40:23,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:23,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:23,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:23,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 20:40:23,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:40:23,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:40:23,673 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:23,673 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-30 20:40:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:24,547 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-30 20:40:24,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 20:40:24,547 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-30 20:40:24,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:24,547 INFO L225 Difference]: With dead ends: 112 [2018-09-30 20:40:24,548 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:40:24,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:40:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 20:40:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 20:40:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 20:40:24,550 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-30 20:40:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:24,550 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 20:40:24,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:40:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 20:40:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 20:40:24,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:24,551 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-30 20:40:24,551 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:24,551 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:24,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1103805603, now seen corresponding path program 106 times [2018-09-30 20:40:24,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:24,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:24,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:24,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:24,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:25,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:25,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:25,365 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:25,517 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:25,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:25,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:25,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:25,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 20:40:25,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 20:40:25,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 20:40:25,798 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:25,798 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-30 20:40:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:26,592 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 20:40:26,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 20:40:26,592 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-30 20:40:26,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:26,592 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:40:26,592 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 20:40:26,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:26,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 20:40:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 20:40:26,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 20:40:26,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 20:40:26,595 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-30 20:40:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:26,595 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 20:40:26,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 20:40:26,595 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 20:40:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 20:40:26,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:26,596 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-30 20:40:26,596 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:26,596 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:26,596 INFO L82 PathProgramCache]: Analyzing trace with hash -141762868, now seen corresponding path program 107 times [2018-09-30 20:40:26,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:26,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:26,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:26,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:26,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:27,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:27,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:27,274 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:27,578 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 20:40:27,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:27,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:27,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:27,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 20:40:27,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 20:40:27,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 20:40:27,856 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:27,856 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-30 20:40:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:28,744 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-30 20:40:28,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 20:40:28,744 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-30 20:40:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:28,745 INFO L225 Difference]: With dead ends: 114 [2018-09-30 20:40:28,745 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 20:40:28,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 20:40:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 20:40:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:40:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 20:40:28,747 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-30 20:40:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:28,747 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 20:40:28,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 20:40:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 20:40:28,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 20:40:28,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:28,748 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-30 20:40:28,748 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:28,748 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:28,748 INFO L82 PathProgramCache]: Analyzing trace with hash -99679805, now seen corresponding path program 108 times [2018-09-30 20:40:28,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:28,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:28,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:28,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:28,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:29,439 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:29,439 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:29,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:29,772 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 20:40:29,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:29,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:30,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:30,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 20:40:30,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 20:40:30,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 20:40:30,058 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:30,058 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-30 20:40:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:30,871 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 20:40:30,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 20:40:30,871 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-30 20:40:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:30,872 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:40:30,872 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 20:40:30,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:30,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 20:40:30,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 20:40:30,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 20:40:30,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 20:40:30,874 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-30 20:40:30,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:30,875 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 20:40:30,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 20:40:30,875 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 20:40:30,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 20:40:30,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:30,876 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-30 20:40:30,876 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:30,876 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1204895148, now seen corresponding path program 109 times [2018-09-30 20:40:30,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:30,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:30,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:30,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:30,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:31,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:31,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:31,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:31,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:31,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:31,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 20:40:31,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 20:40:32,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 20:40:32,001 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:32,001 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-30 20:40:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:32,929 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-30 20:40:32,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 20:40:32,929 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-30 20:40:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:32,930 INFO L225 Difference]: With dead ends: 116 [2018-09-30 20:40:32,930 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 20:40:32,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 20:40:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 20:40:32,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 20:40:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 20:40:32,933 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-30 20:40:32,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:32,933 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 20:40:32,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 20:40:32,933 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 20:40:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 20:40:32,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:32,934 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-30 20:40:32,934 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:32,934 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:32,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1302954269, now seen corresponding path program 110 times [2018-09-30 20:40:32,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:32,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:32,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:32,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:32,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:33,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:33,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:33,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:33,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:33,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:33,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:34,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:34,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 20:40:34,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 20:40:34,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 20:40:34,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:34,064 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-30 20:40:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:34,975 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 20:40:34,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 20:40:34,975 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-30 20:40:34,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:34,976 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:40:34,976 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:40:34,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:40:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 20:40:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:40:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 20:40:34,979 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-30 20:40:34,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:34,979 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 20:40:34,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 20:40:34,979 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 20:40:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:40:34,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:34,980 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-30 20:40:34,980 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:34,980 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:34,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1736874868, now seen corresponding path program 111 times [2018-09-30 20:40:34,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:34,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:34,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:34,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:34,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:35,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:35,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:35,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:36,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-30 20:40:36,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:36,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:36,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:36,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 20:40:36,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 20:40:36,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 20:40:36,586 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:36,586 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-30 20:40:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:37,406 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-30 20:40:37,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 20:40:37,406 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-30 20:40:37,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:37,407 INFO L225 Difference]: With dead ends: 118 [2018-09-30 20:40:37,407 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 20:40:37,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:40:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 20:40:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 20:40:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 20:40:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 20:40:37,409 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-30 20:40:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:37,409 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 20:40:37,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 20:40:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 20:40:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 20:40:37,410 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:37,410 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-30 20:40:37,410 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:37,410 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1991455747, now seen corresponding path program 112 times [2018-09-30 20:40:37,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:37,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:37,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:37,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:37,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:38,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:38,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:38,128 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:38,285 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:38,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:38,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:38,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:38,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 20:40:38,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 20:40:38,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 20:40:38,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:38,589 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-09-30 20:40:39,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:39,319 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 20:40:39,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 20:40:39,319 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-09-30 20:40:39,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:39,319 INFO L225 Difference]: With dead ends: 119 [2018-09-30 20:40:39,319 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 20:40:39,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 20:40:39,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 20:40:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 20:40:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 20:40:39,322 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-30 20:40:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:39,322 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 20:40:39,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 20:40:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 20:40:39,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:40:39,322 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:39,322 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-30 20:40:39,322 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:39,323 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:39,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1605587820, now seen corresponding path program 113 times [2018-09-30 20:40:39,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:39,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:39,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:39,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:39,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:40,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:40,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:40,087 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:40,420 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 20:40:40,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:40,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:40,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:40,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 20:40:40,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 20:40:40,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 20:40:40,863 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:40,863 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-09-30 20:40:41,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:41,528 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-30 20:40:41,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 20:40:41,528 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-09-30 20:40:41,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:41,529 INFO L225 Difference]: With dead ends: 120 [2018-09-30 20:40:41,529 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 20:40:41,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:40:41,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 20:40:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 20:40:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 20:40:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 20:40:41,531 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-30 20:40:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:41,531 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 20:40:41,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 20:40:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 20:40:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 20:40:41,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:41,532 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-09-30 20:40:41,532 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:41,532 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:41,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1766383325, now seen corresponding path program 114 times [2018-09-30 20:40:41,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:41,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:41,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:41,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:41,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:42,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:42,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:42,255 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:42,603 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-30 20:40:42,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:42,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:42,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:42,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 20:40:42,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 20:40:42,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 20:40:42,909 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:42,909 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-09-30 20:40:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:43,706 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 20:40:43,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 20:40:43,706 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-09-30 20:40:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:43,707 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:40:43,707 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 20:40:43,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 20:40:43,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 20:40:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 20:40:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 20:40:43,710 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-30 20:40:43,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:43,710 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 20:40:43,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 20:40:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 20:40:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 20:40:43,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:43,711 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-09-30 20:40:43,711 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:43,711 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:43,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1076693580, now seen corresponding path program 115 times [2018-09-30 20:40:43,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:43,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:43,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:43,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:43,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:44,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:44,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:44,450 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:44,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:44,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:44,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 20:40:44,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 20:40:44,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 20:40:44,900 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:44,900 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-09-30 20:40:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:45,847 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-30 20:40:45,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 20:40:45,847 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-30 20:40:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:45,848 INFO L225 Difference]: With dead ends: 122 [2018-09-30 20:40:45,848 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 20:40:45,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 20:40:45,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 20:40:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 20:40:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 20:40:45,850 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-30 20:40:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:45,850 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 20:40:45,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 20:40:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 20:40:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 20:40:45,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:45,851 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-09-30 20:40:45,851 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:45,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:45,851 INFO L82 PathProgramCache]: Analyzing trace with hash -982235581, now seen corresponding path program 116 times [2018-09-30 20:40:45,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:45,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:45,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:45,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:45,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:46,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:46,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:46,578 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:46,739 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:46,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:46,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:47,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:47,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 20:40:47,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 20:40:47,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 20:40:47,034 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:47,034 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-09-30 20:40:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:47,644 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 20:40:47,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 20:40:47,644 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-09-30 20:40:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:47,645 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:40:47,645 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 20:40:47,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 20:40:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 20:40:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 20:40:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 20:40:47,647 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-30 20:40:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:47,647 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 20:40:47,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 20:40:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 20:40:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 20:40:47,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:47,648 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-09-30 20:40:47,648 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:47,648 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:47,648 INFO L82 PathProgramCache]: Analyzing trace with hash -384530132, now seen corresponding path program 117 times [2018-09-30 20:40:47,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:47,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:47,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:47,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:47,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:48,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:48,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:48,387 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:48,758 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-30 20:40:48,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:48,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:49,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:49,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 20:40:49,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 20:40:49,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 20:40:49,057 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:49,057 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-09-30 20:40:49,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:49,848 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-30 20:40:49,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 20:40:49,848 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-09-30 20:40:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:49,849 INFO L225 Difference]: With dead ends: 124 [2018-09-30 20:40:49,849 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 20:40:49,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 20:40:49,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 20:40:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 20:40:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 20:40:49,851 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-30 20:40:49,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:49,852 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 20:40:49,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 20:40:49,852 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 20:40:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 20:40:49,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:49,852 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-09-30 20:40:49,852 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:49,853 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:49,853 INFO L82 PathProgramCache]: Analyzing trace with hash 964469603, now seen corresponding path program 118 times [2018-09-30 20:40:49,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:49,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:49,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:49,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:49,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:50,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:50,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:50,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:50,608 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:50,791 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:50,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:50,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:51,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:51,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 20:40:51,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 20:40:51,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 20:40:51,175 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:51,175 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-09-30 20:40:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:51,978 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 20:40:51,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 20:40:51,978 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-09-30 20:40:51,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:51,979 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:40:51,979 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 20:40:51,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:40:51,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 20:40:51,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 20:40:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 20:40:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 20:40:51,981 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-30 20:40:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:51,981 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 20:40:51,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 20:40:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 20:40:51,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 20:40:51,982 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:51,982 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-09-30 20:40:51,982 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:51,982 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:51,982 INFO L82 PathProgramCache]: Analyzing trace with hash -166211572, now seen corresponding path program 119 times [2018-09-30 20:40:51,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:51,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:51,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:51,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:51,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:52,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:52,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:52,749 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:53,106 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 20:40:53,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:53,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:53,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:53,428 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 20:40:53,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 20:40:53,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 20:40:53,429 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:53,430 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-09-30 20:40:54,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:54,036 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-09-30 20:40:54,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 20:40:54,036 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-30 20:40:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:54,037 INFO L225 Difference]: With dead ends: 126 [2018-09-30 20:40:54,037 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 20:40:54,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:54,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 20:40:54,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 20:40:54,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 20:40:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 20:40:54,041 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-09-30 20:40:54,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:54,041 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 20:40:54,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 20:40:54,041 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 20:40:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 20:40:54,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:54,042 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-09-30 20:40:54,042 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:54,042 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:54,042 INFO L82 PathProgramCache]: Analyzing trace with hash -857589629, now seen corresponding path program 120 times [2018-09-30 20:40:54,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:54,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:54,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:54,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:54,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:54,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:54,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:54,836 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:55,225 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 20:40:55,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:55,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:55,546 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:55,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 20:40:55,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 20:40:55,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 20:40:55,548 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:55,548 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-09-30 20:40:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:56,520 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 20:40:56,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 20:40:56,520 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-09-30 20:40:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:56,520 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:40:56,520 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 20:40:56,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:56,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 20:40:56,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 20:40:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 20:40:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 20:40:56,523 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-09-30 20:40:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:56,523 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 20:40:56,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 20:40:56,523 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 20:40:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 20:40:56,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:56,523 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-09-30 20:40:56,524 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:56,524 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash -815472916, now seen corresponding path program 121 times [2018-09-30 20:40:56,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:56,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:56,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:56,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:56,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:57,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:57,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:57,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:57,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:57,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:57,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 20:40:57,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 20:40:57,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 20:40:57,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:57,787 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-09-30 20:40:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:58,613 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-09-30 20:40:58,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 20:40:58,613 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-09-30 20:40:58,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:58,614 INFO L225 Difference]: With dead ends: 128 [2018-09-30 20:40:58,614 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 20:40:58,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 20:40:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 20:40:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 20:40:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 20:40:58,616 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-09-30 20:40:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:58,616 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 20:40:58,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 20:40:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 20:40:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 20:40:58,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:58,617 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-09-30 20:40:58,617 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:58,617 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:58,617 INFO L82 PathProgramCache]: Analyzing trace with hash 490145187, now seen corresponding path program 122 times [2018-09-30 20:40:58,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:58,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:58,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:58,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:58,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:59,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:59,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:59,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:59,575 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:59,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:59,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:59,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:59,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 20:40:59,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 20:40:59,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 20:40:59,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:59,890 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-09-30 20:41:00,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:00,781 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 20:41:00,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 20:41:00,781 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-09-30 20:41:00,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:00,782 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:41:00,782 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 20:41:00,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:00,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 20:41:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 20:41:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 20:41:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 20:41:00,785 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-09-30 20:41:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:00,785 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 20:41:00,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 20:41:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 20:41:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 20:41:00,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:00,786 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-09-30 20:41:00,786 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:00,786 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:00,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1985366580, now seen corresponding path program 123 times [2018-09-30 20:41:00,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:00,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:00,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:00,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:00,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:01,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:01,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:01,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:02,254 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-30 20:41:02,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:02,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:02,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:02,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 20:41:02,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 20:41:02,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 20:41:02,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:02,566 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-09-30 20:41:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:03,546 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-09-30 20:41:03,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 20:41:03,546 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-30 20:41:03,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:03,547 INFO L225 Difference]: With dead ends: 130 [2018-09-30 20:41:03,547 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 20:41:03,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:41:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 20:41:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 20:41:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 20:41:03,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 20:41:03,549 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-09-30 20:41:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:03,549 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 20:41:03,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 20:41:03,549 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 20:41:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 20:41:03,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:03,550 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-09-30 20:41:03,550 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:03,550 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:03,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1416820029, now seen corresponding path program 124 times [2018-09-30 20:41:03,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:03,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:03,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:03,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:03,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:04,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:04,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:04,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:04,564 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:04,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:04,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:04,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:04,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 20:41:04,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 20:41:04,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 20:41:04,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:04,886 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-09-30 20:41:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:05,803 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 20:41:05,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 20:41:05,803 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-09-30 20:41:05,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:05,804 INFO L225 Difference]: With dead ends: 131 [2018-09-30 20:41:05,804 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 20:41:05,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:05,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 20:41:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 20:41:05,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 20:41:05,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 20:41:05,806 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-09-30 20:41:05,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:05,806 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 20:41:05,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 20:41:05,806 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 20:41:05,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 20:41:05,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:05,807 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-09-30 20:41:05,807 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:05,807 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:05,807 INFO L82 PathProgramCache]: Analyzing trace with hash -971746132, now seen corresponding path program 125 times [2018-09-30 20:41:05,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:05,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:05,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:05,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:05,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:06,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:06,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:06,913 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:07,314 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 20:41:07,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:07,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:07,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:07,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 20:41:07,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 20:41:07,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 20:41:07,636 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:07,636 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-09-30 20:41:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:08,455 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-09-30 20:41:08,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 20:41:08,455 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-09-30 20:41:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:08,455 INFO L225 Difference]: With dead ends: 132 [2018-09-30 20:41:08,456 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 20:41:08,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:41:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 20:41:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 20:41:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 20:41:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 20:41:08,458 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-09-30 20:41:08,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:08,458 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 20:41:08,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 20:41:08,458 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 20:41:08,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 20:41:08,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:08,459 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-09-30 20:41:08,459 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:08,459 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:08,459 INFO L82 PathProgramCache]: Analyzing trace with hash -59357213, now seen corresponding path program 126 times [2018-09-30 20:41:08,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:08,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:08,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:08,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:08,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:09,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:09,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:09,268 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:09,685 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-30 20:41:09,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:09,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:10,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:10,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 20:41:10,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 20:41:10,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 20:41:10,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:10,042 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-09-30 20:41:10,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:10,883 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 20:41:10,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 20:41:10,883 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-09-30 20:41:10,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:10,884 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:41:10,884 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:41:10,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:41:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 20:41:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 20:41:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 20:41:10,887 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-09-30 20:41:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:10,887 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 20:41:10,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 20:41:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 20:41:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 20:41:10,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:10,888 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-09-30 20:41:10,888 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:10,889 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:10,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1840071796, now seen corresponding path program 127 times [2018-09-30 20:41:10,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:10,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:10,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:10,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:10,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:11,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:11,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:11,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:12,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:12,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:12,452 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 20:41:12,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 20:41:12,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 20:41:12,454 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:12,454 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-09-30 20:41:13,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:13,379 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-09-30 20:41:13,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 20:41:13,380 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-30 20:41:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:13,380 INFO L225 Difference]: With dead ends: 134 [2018-09-30 20:41:13,381 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 20:41:13,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:41:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 20:41:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 20:41:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 20:41:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 20:41:13,384 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-09-30 20:41:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:13,384 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 20:41:13,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 20:41:13,384 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 20:41:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 20:41:13,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:13,385 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-09-30 20:41:13,385 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:13,385 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:13,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1207649021, now seen corresponding path program 128 times [2018-09-30 20:41:13,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:13,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:13,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:13,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:13,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:14,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:14,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:14,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:14,446 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:14,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:14,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:14,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:14,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 20:41:14,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 20:41:14,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 20:41:14,790 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:14,790 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-09-30 20:41:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:15,847 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 20:41:15,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 20:41:15,847 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-09-30 20:41:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:15,847 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:41:15,847 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 20:41:15,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 20:41:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 20:41:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 20:41:15,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 20:41:15,851 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-09-30 20:41:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:15,851 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 20:41:15,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 20:41:15,851 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 20:41:15,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 20:41:15,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:15,852 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-09-30 20:41:15,852 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:15,852 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:15,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1217587820, now seen corresponding path program 129 times [2018-09-30 20:41:15,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:15,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:15,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:15,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:15,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:16,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:16,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:16,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:17,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-30 20:41:17,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:17,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:17,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:17,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 20:41:17,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 20:41:17,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 20:41:17,736 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:17,736 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-09-30 20:41:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:18,793 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-09-30 20:41:18,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 20:41:18,793 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-09-30 20:41:18,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:18,794 INFO L225 Difference]: With dead ends: 136 [2018-09-30 20:41:18,794 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 20:41:18,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:41:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 20:41:18,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 20:41:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 20:41:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 20:41:18,796 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-09-30 20:41:18,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:18,797 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 20:41:18,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 20:41:18,797 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 20:41:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 20:41:18,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:18,798 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-09-30 20:41:18,798 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:18,798 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:18,798 INFO L82 PathProgramCache]: Analyzing trace with hash -909481437, now seen corresponding path program 130 times [2018-09-30 20:41:18,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:18,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:18,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:18,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:18,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:19,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:19,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:19,807 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:19,989 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:19,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:20,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:20,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:20,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 20:41:20,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 20:41:20,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 20:41:20,338 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:20,338 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-09-30 20:41:21,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:21,377 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 20:41:21,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 20:41:21,377 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-09-30 20:41:21,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:21,378 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:41:21,378 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 20:41:21,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 20:41:21,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 20:41:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 20:41:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 20:41:21,380 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-09-30 20:41:21,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:21,380 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 20:41:21,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 20:41:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 20:41:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 20:41:21,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:21,381 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-09-30 20:41:21,381 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:21,381 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:21,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1870848332, now seen corresponding path program 131 times [2018-09-30 20:41:21,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:21,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:21,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:21,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:21,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:22,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:22,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:22,478 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:22,894 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 20:41:22,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:22,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:23,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:23,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 20:41:23,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 20:41:23,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 20:41:23,234 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:23,235 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-09-30 20:41:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:24,149 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-09-30 20:41:24,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 20:41:24,150 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-30 20:41:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:24,150 INFO L225 Difference]: With dead ends: 138 [2018-09-30 20:41:24,150 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 20:41:24,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:41:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 20:41:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 20:41:24,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 20:41:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 20:41:24,152 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-09-30 20:41:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:24,153 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 20:41:24,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 20:41:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 20:41:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 20:41:24,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:24,153 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-09-30 20:41:24,153 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:24,153 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:24,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2133242045, now seen corresponding path program 132 times [2018-09-30 20:41:24,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:24,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:24,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:24,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:24,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:25,074 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:25,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:25,080 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:25,531 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 20:41:25,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:25,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:25,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:25,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 20:41:25,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 20:41:25,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 20:41:25,872 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:25,872 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-09-30 20:41:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:26,565 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 20:41:26,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 20:41:26,566 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-09-30 20:41:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:26,566 INFO L225 Difference]: With dead ends: 139 [2018-09-30 20:41:26,566 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 20:41:26,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:26,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 20:41:26,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 20:41:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 20:41:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 20:41:26,568 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-09-30 20:41:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:26,568 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 20:41:26,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 20:41:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 20:41:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 20:41:26,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:26,569 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-09-30 20:41:26,569 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:26,569 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1705992148, now seen corresponding path program 133 times [2018-09-30 20:41:26,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:26,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:26,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:26,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:26,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:27,564 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:27,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:27,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:27,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:28,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:28,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 20:41:28,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 20:41:28,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 20:41:28,155 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:28,156 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-09-30 20:41:29,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:29,249 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-09-30 20:41:29,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 20:41:29,249 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-09-30 20:41:29,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:29,249 INFO L225 Difference]: With dead ends: 140 [2018-09-30 20:41:29,250 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 20:41:29,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:41:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 20:41:29,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 20:41:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 20:41:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 20:41:29,252 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-09-30 20:41:29,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:29,252 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 20:41:29,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 20:41:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 20:41:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 20:41:29,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:29,252 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-09-30 20:41:29,253 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:29,253 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:29,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1346147229, now seen corresponding path program 134 times [2018-09-30 20:41:29,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:29,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:29,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:29,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:29,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:30,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:30,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:30,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:30,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:30,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:30,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:30,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:30,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 20:41:30,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 20:41:30,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 20:41:30,718 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:30,718 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-09-30 20:41:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:31,883 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 20:41:31,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 20:41:31,884 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-09-30 20:41:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:31,884 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:41:31,884 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 20:41:31,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 20:41:31,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 20:41:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 20:41:31,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 20:41:31,886 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-09-30 20:41:31,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:31,887 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 20:41:31,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 20:41:31,887 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 20:41:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 20:41:31,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:31,887 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-09-30 20:41:31,888 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:31,888 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:31,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1219110668, now seen corresponding path program 135 times [2018-09-30 20:41:31,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:31,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:31,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:31,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:31,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:32,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:32,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:32,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:33,311 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-30 20:41:33,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:33,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:33,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:33,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 20:41:33,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 20:41:33,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 20:41:33,658 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:33,658 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-09-30 20:41:34,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:34,388 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-09-30 20:41:34,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 20:41:34,389 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-09-30 20:41:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:34,389 INFO L225 Difference]: With dead ends: 142 [2018-09-30 20:41:34,389 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 20:41:34,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 20:41:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 20:41:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 20:41:34,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 20:41:34,392 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-09-30 20:41:34,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:34,392 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 20:41:34,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 20:41:34,392 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 20:41:34,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 20:41:34,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:34,393 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-09-30 20:41:34,393 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:34,393 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash -862273149, now seen corresponding path program 136 times [2018-09-30 20:41:34,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:34,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:34,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:34,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:34,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:35,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:35,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:35,390 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:35,584 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:35,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:35,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:35,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:35,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 20:41:35,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 20:41:35,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 20:41:35,936 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:35,936 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-09-30 20:41:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:37,251 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 20:41:37,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 20:41:37,251 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-09-30 20:41:37,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:37,252 INFO L225 Difference]: With dead ends: 143 [2018-09-30 20:41:37,252 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 20:41:37,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:41:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 20:41:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 20:41:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 20:41:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 20:41:37,254 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-09-30 20:41:37,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:37,254 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 20:41:37,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-30 20:41:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 20:41:37,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 20:41:37,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:37,255 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-09-30 20:41:37,255 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:37,255 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:37,255 INFO L82 PathProgramCache]: Analyzing trace with hash -960662036, now seen corresponding path program 137 times [2018-09-30 20:41:37,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:37,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:37,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:37,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:37,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:38,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:38,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:38,207 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:38,685 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-30 20:41:38,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:38,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:39,054 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:39,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-30 20:41:39,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 20:41:39,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 20:41:39,056 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:39,056 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-09-30 20:41:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:39,955 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-09-30 20:41:39,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-30 20:41:39,955 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-09-30 20:41:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:39,956 INFO L225 Difference]: With dead ends: 144 [2018-09-30 20:41:39,956 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 20:41:39,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:39,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 20:41:39,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 20:41:39,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 20:41:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 20:41:39,958 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-09-30 20:41:39,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:39,958 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 20:41:39,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 20:41:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 20:41:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 20:41:39,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:39,959 INFO L375 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-09-30 20:41:39,959 INFO L423 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:39,959 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:39,959 INFO L82 PathProgramCache]: Analyzing trace with hash 284249763, now seen corresponding path program 138 times [2018-09-30 20:41:39,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:39,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:39,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:39,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:39,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:40,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:40,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:40,911 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:41,402 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-09-30 20:41:41,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:41,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:41,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:41,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-09-30 20:41:41,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-09-30 20:41:41,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-09-30 20:41:41,749 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:41,749 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-09-30 20:41:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:43,221 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 20:41:43,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-30 20:41:43,221 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-09-30 20:41:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:43,221 INFO L225 Difference]: With dead ends: 145 [2018-09-30 20:41:43,221 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 20:41:43,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:43,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 20:41:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 20:41:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 20:41:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 20:41:43,224 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-09-30 20:41:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:43,224 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 20:41:43,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-09-30 20:41:43,224 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 20:41:43,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 20:41:43,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:43,225 INFO L375 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-09-30 20:41:43,225 INFO L423 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:43,225 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:43,225 INFO L82 PathProgramCache]: Analyzing trace with hash 221809868, now seen corresponding path program 139 times [2018-09-30 20:41:43,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:43,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:43,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:43,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:43,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:44,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:44,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:44,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:44,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:44,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:44,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-30 20:41:44,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 20:41:44,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 20:41:44,750 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:44,750 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-09-30 20:41:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:45,764 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-09-30 20:41:45,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-30 20:41:45,764 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-09-30 20:41:45,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:45,765 INFO L225 Difference]: With dead ends: 146 [2018-09-30 20:41:45,765 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 20:41:45,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 20:41:45,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 20:41:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 20:41:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 20:41:45,767 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-09-30 20:41:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:45,767 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 20:41:45,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 20:41:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 20:41:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 20:41:45,768 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:45,768 INFO L375 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-09-30 20:41:45,768 INFO L423 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:45,768 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:45,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1713826877, now seen corresponding path program 140 times [2018-09-30 20:41:45,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:45,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:45,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:45,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:45,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:46,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:46,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:46,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:46,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:46,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:46,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:47,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:47,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-09-30 20:41:47,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-30 20:41:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-30 20:41:47,448 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:47,448 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-09-30 20:41:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:48,702 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 20:41:48,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 20:41:48,702 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-09-30 20:41:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:48,702 INFO L225 Difference]: With dead ends: 147 [2018-09-30 20:41:48,703 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 20:41:48,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:41:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 20:41:48,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 20:41:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 20:41:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 20:41:48,705 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-09-30 20:41:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:48,705 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 20:41:48,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-30 20:41:48,705 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 20:41:48,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 20:41:48,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:48,706 INFO L375 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-09-30 20:41:48,706 INFO L423 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:48,706 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:48,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1589023828, now seen corresponding path program 141 times [2018-09-30 20:41:48,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:48,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:48,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:48,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:48,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:49,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:49,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:49,679 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:50,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-09-30 20:41:50,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:50,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:50,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:50,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-30 20:41:50,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 20:41:50,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 20:41:50,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:50,533 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-09-30 20:41:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:51,373 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-09-30 20:41:51,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 20:41:51,374 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-09-30 20:41:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:51,374 INFO L225 Difference]: With dead ends: 148 [2018-09-30 20:41:51,374 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:41:51,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:41:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:41:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 20:41:51,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 20:41:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 20:41:51,376 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-09-30 20:41:51,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:51,376 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 20:41:51,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 20:41:51,377 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 20:41:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 20:41:51,377 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:51,377 INFO L375 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-09-30 20:41:51,377 INFO L423 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:51,377 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:51,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2015096605, now seen corresponding path program 142 times [2018-09-30 20:41:51,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:51,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:51,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:51,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:51,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:52,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:52,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:52,570 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:52,780 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:52,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:52,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:53,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:53,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-09-30 20:41:53,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-09-30 20:41:53,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-09-30 20:41:53,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:53,144 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-09-30 20:41:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:54,440 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 20:41:54,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-30 20:41:54,441 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-09-30 20:41:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:54,441 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:41:54,441 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:41:54,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:41:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:41:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 20:41:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 20:41:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 20:41:54,444 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-09-30 20:41:54,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:54,444 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 20:41:54,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-09-30 20:41:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 20:41:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 20:41:54,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:54,444 INFO L375 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-09-30 20:41:54,445 INFO L423 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:54,445 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:54,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1956516492, now seen corresponding path program 143 times [2018-09-30 20:41:54,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:54,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:54,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:54,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:54,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:55,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:55,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:55,489 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:55,972 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 20:41:55,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:56,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:56,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:56,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-30 20:41:56,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 20:41:56,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 20:41:56,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:56,345 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-09-30 20:41:57,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:57,697 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-09-30 20:41:57,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-30 20:41:57,698 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-09-30 20:41:57,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:57,698 INFO L225 Difference]: With dead ends: 150 [2018-09-30 20:41:57,698 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 20:41:57,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:41:57,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 20:41:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 20:41:57,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 20:41:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 20:41:57,700 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-09-30 20:41:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:57,701 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 20:41:57,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 20:41:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 20:41:57,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 20:41:57,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:57,701 INFO L375 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-09-30 20:41:57,701 INFO L423 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:57,701 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash 522470915, now seen corresponding path program 144 times [2018-09-30 20:41:57,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:57,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:57,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:57,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:57,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:58,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:58,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:58,695 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:59,215 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 20:41:59,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:59,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:59,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:59,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-09-30 20:41:59,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-30 20:41:59,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-30 20:41:59,583 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:59,583 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-09-30 20:42:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:00,440 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 20:42:00,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-30 20:42:00,441 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-09-30 20:42:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:00,441 INFO L225 Difference]: With dead ends: 151 [2018-09-30 20:42:00,441 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 20:42:00,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:00,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 20:42:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 20:42:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 20:42:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 20:42:00,444 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-09-30 20:42:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:00,444 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 20:42:00,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-30 20:42:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 20:42:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 20:42:00,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:00,445 INFO L375 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-09-30 20:42:00,445 INFO L423 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:00,445 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:00,445 INFO L82 PathProgramCache]: Analyzing trace with hash -983269012, now seen corresponding path program 145 times [2018-09-30 20:42:00,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:00,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:00,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:00,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:00,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:01,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:01,445 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:01,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:01,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:02,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:02,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-30 20:42:02,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 20:42:02,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 20:42:02,025 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:02,026 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-09-30 20:42:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:03,448 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-09-30 20:42:03,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-30 20:42:03,449 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-09-30 20:42:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:03,449 INFO L225 Difference]: With dead ends: 152 [2018-09-30 20:42:03,449 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 20:42:03,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:03,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 20:42:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 20:42:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 20:42:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 20:42:03,451 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-09-30 20:42:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:03,452 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 20:42:03,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 20:42:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 20:42:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 20:42:03,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:03,452 INFO L375 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-09-30 20:42:03,452 INFO L423 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:03,452 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:03,453 INFO L82 PathProgramCache]: Analyzing trace with hash -416566493, now seen corresponding path program 146 times [2018-09-30 20:42:03,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:03,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:03,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:03,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:03,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:04,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:04,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:04,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:04,730 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:04,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:04,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:05,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:05,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-09-30 20:42:05,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 20:42:05,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 20:42:05,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:05,103 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-09-30 20:42:06,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:06,485 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 20:42:06,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 20:42:06,485 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-09-30 20:42:06,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:06,486 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:42:06,486 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 20:42:06,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:06,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 20:42:06,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 20:42:06,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 20:42:06,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 20:42:06,489 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-09-30 20:42:06,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:06,489 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 20:42:06,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 20:42:06,490 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 20:42:06,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 20:42:06,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:06,490 INFO L375 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-09-30 20:42:06,490 INFO L423 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:06,490 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:06,491 INFO L82 PathProgramCache]: Analyzing trace with hash -28657588, now seen corresponding path program 147 times [2018-09-30 20:42:06,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:06,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:06,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:06,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:06,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:07,588 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:07,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:07,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:08,122 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-09-30 20:42:08,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:08,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:08,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:08,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-30 20:42:08,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 20:42:08,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 20:42:08,503 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:08,504 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-09-30 20:42:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:09,896 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-09-30 20:42:09,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-30 20:42:09,896 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-09-30 20:42:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:09,896 INFO L225 Difference]: With dead ends: 154 [2018-09-30 20:42:09,896 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 20:42:09,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 20:42:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 20:42:09,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 20:42:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 20:42:09,900 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-09-30 20:42:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:09,900 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 20:42:09,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 20:42:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 20:42:09,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 20:42:09,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:09,901 INFO L375 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-09-30 20:42:09,901 INFO L423 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:09,901 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:09,901 INFO L82 PathProgramCache]: Analyzing trace with hash -888383421, now seen corresponding path program 148 times [2018-09-30 20:42:09,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:09,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:09,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:09,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:09,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:10,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:10,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:10,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:11,181 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:11,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:11,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:11,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:11,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-09-30 20:42:11,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-09-30 20:42:11,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-09-30 20:42:11,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:11,549 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-09-30 20:42:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:12,959 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 20:42:12,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-30 20:42:12,959 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-09-30 20:42:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:12,959 INFO L225 Difference]: With dead ends: 155 [2018-09-30 20:42:12,959 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 20:42:12,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:12,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 20:42:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 20:42:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 20:42:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 20:42:12,962 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-09-30 20:42:12,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:12,962 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 20:42:12,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-09-30 20:42:12,962 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 20:42:12,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 20:42:12,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:12,962 INFO L375 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-09-30 20:42:12,963 INFO L423 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:12,963 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:12,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1770080468, now seen corresponding path program 149 times [2018-09-30 20:42:12,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:12,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:12,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:12,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:12,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:14,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:14,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:14,053 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:42:14,570 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2018-09-30 20:42:14,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:14,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:14,962 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:14,962 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-09-30 20:42:14,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 20:42:14,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 20:42:14,964 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:14,964 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 152 states. Received shutdown request... [2018-09-30 20:42:15,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:42:15,272 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:42:15,278 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:42:15,278 INFO L202 PluginConnector]: Adding new model functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:42:15 BoogieIcfgContainer [2018-09-30 20:42:15,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:42:15,279 INFO L168 Benchmark]: Toolchain (without parser) took 240337.84 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 663.7 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -214.7 MB). Peak memory consumption was 449.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:42:15,280 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:42:15,280 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.08 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:42:15,281 INFO L168 Benchmark]: Boogie Preprocessor took 23.42 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:42:15,281 INFO L168 Benchmark]: RCFGBuilder took 233.70 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:42:15,282 INFO L168 Benchmark]: TraceAbstraction took 240032.07 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 663.7 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -235.8 MB). Peak memory consumption was 427.9 MB. Max. memory is 7.1 GB. [2018-09-30 20:42:15,284 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 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.08 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.42 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 233.70 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 240032.07 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 663.7 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -235.8 MB). Peak memory consumption was 427.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was constructing difference of abstraction (153states) and FLOYD_HOARE automaton (currently 77 states, 152 states before enhancement), while ReachableStatesComputation was computing reachable states (75 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 239.9s OverallTime, 150 OverallIterations, 149 TraceHistogramMax, 85.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 448 SDtfs, 0 SDslu, 6558 SDs, 0 SdLazy, 17957 SolverSat, 255 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22948 GetRequests, 11623 SyntacticMatches, 0 SemanticMatches, 11325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=153occurred in iteration=149, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 149 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 3.1s SsaConstructionTime, 25.0s SatisfiabilityAnalysisTime, 119.6s InterpolantComputationTime, 23247 NumberOfCodeBlocks, 23247 NumberOfCodeBlocksAsserted, 3174 NumberOfCheckSat, 22948 ConstructedInterpolants, 0 QuantifiedInterpolants, 6908542 SizeOfPredicates, 33674 NumberOfNonLiveVariables, 114134 ConjunctsInSsa, 44998 ConjunctsInUnsatCore, 299 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1124950 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-42-15-294.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-42-15-294.csv Completed graceful shutdown