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/down.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:44:28,674 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:44:28,676 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:44:28,688 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:44:28,688 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:44:28,689 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:44:28,691 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:44:28,692 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:44:28,694 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:44:28,695 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:44:28,696 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-26 21:44:28,721 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-26 21:44:28,737 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:44:28,737 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:44:28,738 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:44:28,738 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:44:28,739 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:44:28,739 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:44:28,739 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:44:28,739 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:44:28,740 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:44:28,740 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:44:28,740 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:44:28,740 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:44:28,740 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:44:28,741 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:44:28,741 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:44:28,741 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:44:28,741 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:44:28,741 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:44:28,742 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:44:28,742 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:44:28,742 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:44:28,742 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:44:28,742 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:44:28,743 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:44:28,743 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:44:28,743 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:44:28,743 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:44:28,743 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:44:28,744 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:44:28,744 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:44:28,744 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:44:28,787 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:44:28,800 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:44:28,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:44:28,805 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:44:28,806 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:44:28,807 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-26 21:44:28,807 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-09-26 21:44:28,858 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:44:28,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:44:28,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:44:28,862 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:44:28,862 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:44:28,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:44:28" (1/1) ... [2018-09-26 21:44:28,896 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:44:28" (1/1) ... [2018-09-26 21:44:28,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:44:28,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:44:28,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:44:28,904 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:44:28,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:44:28" (1/1) ... [2018-09-26 21:44:28,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:44:28" (1/1) ... [2018-09-26 21:44:28,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:44:28" (1/1) ... [2018-09-26 21:44:28,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:44:28" (1/1) ... [2018-09-26 21:44:28,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:44:28" (1/1) ... [2018-09-26 21:44:28,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:44:28" (1/1) ... [2018-09-26 21:44:28,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:44:28" (1/1) ... [2018-09-26 21:44:28,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:44:28,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:44:28,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:44:28,926 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:44:28,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:44:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:44:29,006 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-26 21:44:29,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:44:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:44:29,273 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:44:29,274 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:44:29 BoogieIcfgContainer [2018-09-26 21:44:29,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:44:29,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:44:29,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:44:29,278 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:44:29,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:44:28" (1/2) ... [2018-09-26 21:44:29,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5c6d12 and model type down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:44:29, skipping insertion in model container [2018-09-26 21:44:29,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:44:29" (2/2) ... [2018-09-26 21:44:29,282 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-26 21:44:29,292 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:44:29,300 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:44:29,351 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:44:29,352 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:44:29,352 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:44:29,353 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:44:29,353 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:44:29,353 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:44:29,353 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:44:29,353 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:44:29,354 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:44:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-26 21:44:29,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:44:29,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:29,377 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:44:29,378 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:29,386 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1951930377, now seen corresponding path program 1 times [2018-09-26 21:44:29,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:29,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:29,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:29,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:29,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:29,548 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:44:29,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:44:29,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:44:29,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:44:29,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:29,579 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-26 21:44:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:29,811 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-09-26 21:44:29,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:44:29,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-26 21:44:29,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:29,824 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:44:29,824 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:44:29,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:44:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2018-09-26 21:44:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:44:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2018-09-26 21:44:29,862 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2018-09-26 21:44:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:29,862 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2018-09-26 21:44:29,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:44:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2018-09-26 21:44:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:44:29,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:29,863 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:44:29,863 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:29,864 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:29,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1951989959, now seen corresponding path program 1 times [2018-09-26 21:44:29,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:29,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:29,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:29,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:29,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:29,912 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:44:29,912 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:44:29,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:44:29,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:44:29,914 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:29,914 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 4 states. [2018-09-26 21:44:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:30,052 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2018-09-26 21:44:30,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:44:30,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-09-26 21:44:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:30,054 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:44:30,054 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:44:30,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:44:30,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:44:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:44:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2018-09-26 21:44:30,060 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2018-09-26 21:44:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:30,061 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2018-09-26 21:44:30,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:44:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2018-09-26 21:44:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:44:30,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:30,062 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:44:30,062 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:30,063 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1455783312, now seen corresponding path program 1 times [2018-09-26 21:44:30,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:30,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:30,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:30,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:30,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-26 21:44:30,149 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:44:30,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-26 21:44:30,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:44:30,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:44:30,150 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:30,150 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2018-09-26 21:44:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:30,665 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-09-26 21:44:30,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:44:30,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-26 21:44:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:30,667 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:44:30,667 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:44:30,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:44:30,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2018-09-26 21:44:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:44:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-09-26 21:44:30,672 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-09-26 21:44:30,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:30,672 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-09-26 21:44:30,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:44:30,672 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-09-26 21:44:30,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:44:30,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:30,673 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:44:30,673 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:30,674 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:30,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1455723730, now seen corresponding path program 1 times [2018-09-26 21:44:30,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:30,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:30,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:30,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:30,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:30,730 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:44:30,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:44:30,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:44:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:44:30,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:30,731 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2018-09-26 21:44:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:30,873 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2018-09-26 21:44:30,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:44:30,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-26 21:44:30,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:30,874 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:44:30,874 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:44:30,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:44:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-26 21:44:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:44:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-09-26 21:44:30,881 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2018-09-26 21:44:30,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:30,881 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-09-26 21:44:30,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:44:30,882 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-09-26 21:44:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:44:30,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:30,882 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:44:30,883 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:30,883 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:30,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1394403420, now seen corresponding path program 1 times [2018-09-26 21:44:30,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:30,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:30,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:30,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:30,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:31,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:31,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:31,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:31,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:31,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:31,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:44:31,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:44:31,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:44:31,356 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:31,356 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2018-09-26 21:44:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:31,583 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-09-26 21:44:31,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:44:31,583 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-09-26 21:44:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:31,584 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:44:31,584 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:44:31,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:31,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:44:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:44:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:44:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-26 21:44:31,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-09-26 21:44:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:31,591 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-26 21:44:31,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:44:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-26 21:44:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:44:31,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:31,592 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-26 21:44:31,592 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:31,593 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:31,593 INFO L82 PathProgramCache]: Analyzing trace with hash -961145443, now seen corresponding path program 2 times [2018-09-26 21:44:31,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:31,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:31,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:31,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:31,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:31,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:31,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:31,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:44:31,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:44:31,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:31,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:32,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:32,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:44:32,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:44:32,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:44:32,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:32,164 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-09-26 21:44:32,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:32,383 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-09-26 21:44:32,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:44:32,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-09-26 21:44:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:32,387 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:44:32,387 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:44:32,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:32,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:44:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-09-26 21:44:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:44:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-26 21:44:32,394 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2018-09-26 21:44:32,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:32,395 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-26 21:44:32,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:44:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-26 21:44:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:44:32,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:32,396 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-26 21:44:32,396 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:32,396 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash -552275309, now seen corresponding path program 3 times [2018-09-26 21:44:32,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:32,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:32,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:32,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:32,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:32,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:32,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:32,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:44:32,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:44:32,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:32,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:32,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:32,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:44:32,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:44:32,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:44:32,711 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:32,711 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-09-26 21:44:32,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:32,961 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-09-26 21:44:32,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:44:32,961 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-09-26 21:44:32,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:32,962 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:44:32,962 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:44:32,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:32,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:44:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:44:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:44:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-26 21:44:32,968 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-09-26 21:44:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:32,968 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-26 21:44:32,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:44:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-26 21:44:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:44:32,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:32,969 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-09-26 21:44:32,970 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:32,970 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:32,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2071906362, now seen corresponding path program 4 times [2018-09-26 21:44:32,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:32,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:32,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:32,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:32,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:33,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:33,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:33,217 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:44:33,231 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:44:33,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:33,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:33,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:33,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:44:33,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:44:33,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:44:33,331 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:33,331 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-09-26 21:44:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:34,104 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-09-26 21:44:34,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:44:34,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-09-26 21:44:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:34,105 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:44:34,106 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:44:34,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:44:34,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2018-09-26 21:44:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:44:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-26 21:44:34,112 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2018-09-26 21:44:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:34,112 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-26 21:44:34,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:44:34,113 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-26 21:44:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:44:34,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:34,114 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:44:34,114 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:34,114 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:34,114 INFO L82 PathProgramCache]: Analyzing trace with hash -992407888, now seen corresponding path program 5 times [2018-09-26 21:44:34,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:34,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:34,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:34,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:34,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:34,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:34,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:34,253 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:44:34,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:44:34,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:34,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:34,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:34,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:44:34,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:44:34,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:44:34,427 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:34,427 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-09-26 21:44:34,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:34,780 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-09-26 21:44:34,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:44:34,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-26 21:44:34,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:34,781 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:44:34,781 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:44:34,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:44:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 21:44:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:44:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-26 21:44:34,789 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2018-09-26 21:44:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:34,789 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-26 21:44:34,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:44:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-26 21:44:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:44:34,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:34,790 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-26 21:44:34,791 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:34,791 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash 390441321, now seen corresponding path program 6 times [2018-09-26 21:44:34,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:34,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:34,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:34,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:34,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:34,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:34,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:34,902 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:44:34,920 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:44:34,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:34,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:35,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:35,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:44:35,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:44:35,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:44:35,013 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:35,013 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2018-09-26 21:44:35,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:35,142 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2018-09-26 21:44:35,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:44:35,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-09-26 21:44:35,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:35,144 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:44:35,144 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:44:35,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:44:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2018-09-26 21:44:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:44:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-09-26 21:44:35,152 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2018-09-26 21:44:35,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:35,152 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-09-26 21:44:35,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:44:35,153 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-09-26 21:44:35,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:44:35,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:35,154 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-26 21:44:35,154 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:35,154 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1927135327, now seen corresponding path program 7 times [2018-09-26 21:44:35,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:35,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:35,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:35,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:35,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:35,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:35,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:35,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:35,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:35,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:35,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:44:35,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:44:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:44:35,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:35,425 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2018-09-26 21:44:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:35,871 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-09-26 21:44:35,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:44:35,871 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-09-26 21:44:35,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:35,872 INFO L225 Difference]: With dead ends: 58 [2018-09-26 21:44:35,872 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:44:35,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:35,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:44:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:44:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:44:35,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-26 21:44:35,880 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-09-26 21:44:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:35,880 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-26 21:44:35,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:44:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-26 21:44:35,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:44:35,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:35,882 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2018-09-26 21:44:35,882 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:35,882 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:35,882 INFO L82 PathProgramCache]: Analyzing trace with hash -906890938, now seen corresponding path program 8 times [2018-09-26 21:44:35,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:35,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:35,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:35,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:35,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:36,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:36,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:36,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:44:36,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:44:36,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:36,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:36,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:36,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:44:36,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:44:36,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:44:36,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:36,380 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2018-09-26 21:44:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:36,632 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-09-26 21:44:36,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:44:36,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-09-26 21:44:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:36,636 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:44:36,637 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:44:36,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:44:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-26 21:44:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:44:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-26 21:44:36,648 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2018-09-26 21:44:36,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:36,649 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-26 21:44:36,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:44:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-26 21:44:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:44:36,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:36,651 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-26 21:44:36,651 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:36,651 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:36,651 INFO L82 PathProgramCache]: Analyzing trace with hash -466038340, now seen corresponding path program 9 times [2018-09-26 21:44:36,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:36,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:36,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:36,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:36,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:36,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:36,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:36,829 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:44:36,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:44:36,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:36,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:37,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:37,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:44:37,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:44:37,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:44:37,238 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:37,238 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 14 states. [2018-09-26 21:44:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:39,138 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-09-26 21:44:39,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:44:39,138 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-09-26 21:44:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:39,139 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:44:39,140 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:44:39,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:44:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-26 21:44:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:44:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-09-26 21:44:39,147 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2018-09-26 21:44:39,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:39,148 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-09-26 21:44:39,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:44:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-09-26 21:44:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:44:39,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:39,149 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2018-09-26 21:44:39,149 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:39,150 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:39,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1282545973, now seen corresponding path program 10 times [2018-09-26 21:44:39,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:39,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:39,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:39,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:39,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:39,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:39,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:39,265 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:44:39,283 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:44:39,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:39,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:39,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:39,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:44:39,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:44:39,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:44:39,378 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:39,378 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2018-09-26 21:44:39,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:39,681 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2018-09-26 21:44:39,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:44:39,682 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-09-26 21:44:39,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:39,683 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:44:39,683 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:44:39,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:39,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:44:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2018-09-26 21:44:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:44:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-26 21:44:39,692 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2018-09-26 21:44:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:39,692 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-26 21:44:39,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:44:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-26 21:44:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:44:39,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:39,694 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-09-26 21:44:39,694 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:39,694 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:39,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1500867115, now seen corresponding path program 11 times [2018-09-26 21:44:39,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:39,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:39,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:39,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:39,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:39,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:39,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:39,918 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:44:39,958 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:44:39,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:39,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:40,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:40,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:44:40,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:44:40,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:44:40,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:40,176 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2018-09-26 21:44:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:41,753 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2018-09-26 21:44:41,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:44:41,753 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-09-26 21:44:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:41,755 INFO L225 Difference]: With dead ends: 76 [2018-09-26 21:44:41,755 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:44:41,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:44:41,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:44:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:44:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-26 21:44:41,762 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2018-09-26 21:44:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:41,763 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-26 21:44:41,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:44:41,763 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-26 21:44:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:44:41,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:41,764 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2018-09-26 21:44:41,764 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:41,764 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:41,764 INFO L82 PathProgramCache]: Analyzing trace with hash 594208338, now seen corresponding path program 12 times [2018-09-26 21:44:41,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:41,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:41,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:41,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:41,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:41,873 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:41,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:41,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:41,882 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:44:41,903 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:44:41,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:41,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:42,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:42,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:44:42,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:44:42,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:44:42,019 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:42,019 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2018-09-26 21:44:42,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:42,205 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-09-26 21:44:42,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:44:42,205 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2018-09-26 21:44:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:42,206 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:44:42,207 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:44:42,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:42,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:44:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-09-26 21:44:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:44:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-26 21:44:42,215 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2018-09-26 21:44:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:42,215 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-26 21:44:42,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:44:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-26 21:44:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:44:42,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:42,216 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-26 21:44:42,217 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:42,217 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:42,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1054367944, now seen corresponding path program 13 times [2018-09-26 21:44:42,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:42,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:42,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:42,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:42,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:42,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:42,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:42,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:42,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:42,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:42,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:44:42,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:44:42,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:44:42,948 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:42,948 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2018-09-26 21:44:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:43,437 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-09-26 21:44:43,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:44:43,438 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2018-09-26 21:44:43,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:43,439 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:44:43,439 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:44:43,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:43,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:44:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:44:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:44:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-26 21:44:43,448 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2018-09-26 21:44:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:43,448 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-26 21:44:43,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:44:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-26 21:44:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:44:43,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:43,449 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2018-09-26 21:44:43,450 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:43,450 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:43,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1098736897, now seen corresponding path program 14 times [2018-09-26 21:44:43,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:43,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:43,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:43,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:43,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:43,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:43,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:43,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:44:43,888 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:44:43,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:43,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:44,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:44,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:44:44,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:44:44,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:44:44,031 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:44,031 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2018-09-26 21:44:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:44,224 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2018-09-26 21:44:44,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:44:44,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2018-09-26 21:44:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:44,225 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:44:44,225 INFO L226 Difference]: Without dead ends: 54 [2018-09-26 21:44:44,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-26 21:44:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2018-09-26 21:44:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:44:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-26 21:44:44,236 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2018-09-26 21:44:44,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:44,236 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-26 21:44:44,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:44:44,236 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-26 21:44:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:44:44,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:44,237 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-26 21:44:44,238 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:44,238 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:44,238 INFO L82 PathProgramCache]: Analyzing trace with hash -48369673, now seen corresponding path program 15 times [2018-09-26 21:44:44,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:44,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:44,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:44,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:44,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:44,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:44,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:44,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:44:44,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:44:44,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:44,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:44,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:44,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:44:44,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:44:44,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:44:44,665 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:44,665 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 20 states. [2018-09-26 21:44:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:45,542 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2018-09-26 21:44:45,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:44:45,542 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2018-09-26 21:44:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:45,543 INFO L225 Difference]: With dead ends: 94 [2018-09-26 21:44:45,543 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:44:45,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:44:45,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:44:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:44:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-09-26 21:44:45,550 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2018-09-26 21:44:45,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:45,550 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-09-26 21:44:45,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:44:45,550 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-09-26 21:44:45,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:44:45,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:45,551 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2018-09-26 21:44:45,551 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:45,551 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:45,552 INFO L82 PathProgramCache]: Analyzing trace with hash 239052638, now seen corresponding path program 16 times [2018-09-26 21:44:45,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:45,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:45,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:45,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:45,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:45,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:45,798 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 [2018-09-26 21:44:45,807 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:44:45,829 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:44:45,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:45,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:45,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:45,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:44:45,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:44:45,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:44:45,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:45,951 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 12 states. [2018-09-26 21:44:46,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:46,256 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2018-09-26 21:44:46,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:44:46,256 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-09-26 21:44:46,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:46,257 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:44:46,257 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:44:46,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:46,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:44:46,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-26 21:44:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:44:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-26 21:44:46,266 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2018-09-26 21:44:46,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:46,266 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-26 21:44:46,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:44:46,266 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-26 21:44:46,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:44:46,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:46,267 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-09-26 21:44:46,267 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:46,268 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:46,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1074641876, now seen corresponding path program 17 times [2018-09-26 21:44:46,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:46,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:46,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:46,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:46,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:46,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:46,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:44:46,570 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:44:46,601 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:44:46,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:46,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:46,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:46,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:44:46,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:44:46,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:44:46,940 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:46,940 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-09-26 21:44:47,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:47,983 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-09-26 21:44:47,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:44:47,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2018-09-26 21:44:47,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:47,984 INFO L225 Difference]: With dead ends: 103 [2018-09-26 21:44:47,984 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:44:47,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:44:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:44:47,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:44:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-26 21:44:47,992 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2018-09-26 21:44:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:47,992 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-26 21:44:47,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:44:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-26 21:44:47,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:44:47,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:47,993 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2018-09-26 21:44:47,993 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:47,993 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:47,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1305899827, now seen corresponding path program 18 times [2018-09-26 21:44:47,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:47,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:47,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:47,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:47,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:48,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:48,157 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 [2018-09-26 21:44:48,164 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:44:48,222 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:44:48,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:48,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:48,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:48,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-26 21:44:48,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:44:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:44:48,363 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:48,364 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 13 states. [2018-09-26 21:44:48,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:48,569 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2018-09-26 21:44:48,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:44:48,573 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2018-09-26 21:44:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:48,573 INFO L225 Difference]: With dead ends: 70 [2018-09-26 21:44:48,573 INFO L226 Difference]: Without dead ends: 64 [2018-09-26 21:44:48,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:48,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-26 21:44:48,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-09-26 21:44:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-26 21:44:48,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-09-26 21:44:48,579 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2018-09-26 21:44:48,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:48,580 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-09-26 21:44:48,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:44:48,580 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-09-26 21:44:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-26 21:44:48,580 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:48,581 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-09-26 21:44:48,581 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:48,581 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1754878403, now seen corresponding path program 19 times [2018-09-26 21:44:48,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:48,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:48,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:48,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:48,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:49,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:49,019 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 [2018-09-26 21:44:49,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:49,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:49,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:49,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:44:49,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:44:49,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:44:49,170 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:49,170 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2018-09-26 21:44:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:50,286 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2018-09-26 21:44:50,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:44:50,286 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2018-09-26 21:44:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:50,287 INFO L225 Difference]: With dead ends: 112 [2018-09-26 21:44:50,287 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:44:50,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:50,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:44:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:44:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:44:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-26 21:44:50,294 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2018-09-26 21:44:50,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:50,294 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-26 21:44:50,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:44:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-26 21:44:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:44:50,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:50,295 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2018-09-26 21:44:50,295 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:50,295 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:50,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1471794070, now seen corresponding path program 20 times [2018-09-26 21:44:50,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:50,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:50,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:50,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:44:50,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:50,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:50,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:44:50,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:44:50,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:44:50,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:50,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:50,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:50,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:44:50,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:44:50,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:44:50,984 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:50,984 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 14 states. [2018-09-26 21:44:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:51,192 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-09-26 21:44:51,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:44:51,193 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-09-26 21:44:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:51,194 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:44:51,194 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:44:51,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:44:51,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2018-09-26 21:44:51,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:44:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-26 21:44:51,200 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2018-09-26 21:44:51,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:51,201 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-26 21:44:51,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:44:51,201 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-26 21:44:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:44:51,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:51,202 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-26 21:44:51,202 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:51,202 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:51,202 INFO L82 PathProgramCache]: Analyzing trace with hash 716104416, now seen corresponding path program 21 times [2018-09-26 21:44:51,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:51,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:51,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:51,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:51,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:51,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:51,586 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 [2018-09-26 21:44:51,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:44:51,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:44:51,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:51,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:51,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:51,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:44:51,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:44:51,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:44:51,824 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:51,824 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2018-09-26 21:44:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:52,820 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-09-26 21:44:52,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:44:52,820 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-09-26 21:44:52,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:52,820 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:44:52,820 INFO L226 Difference]: Without dead ends: 66 [2018-09-26 21:44:52,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-26 21:44:52,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-26 21:44:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-26 21:44:52,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-26 21:44:52,826 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-09-26 21:44:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:52,826 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-26 21:44:52,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:44:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-26 21:44:52,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-26 21:44:52,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:52,827 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2018-09-26 21:44:52,827 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:52,827 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:52,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1699180391, now seen corresponding path program 22 times [2018-09-26 21:44:52,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:52,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:52,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:52,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:52,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:54,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:54,472 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 [2018-09-26 21:44:54,479 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:44:54,508 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:44:54,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:54,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:54,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:54,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-26 21:44:54,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:44:54,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:44:54,733 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:54,733 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2018-09-26 21:44:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:54,960 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2018-09-26 21:44:54,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:44:54,961 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2018-09-26 21:44:54,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:54,962 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:44:54,962 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:44:54,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:44:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2018-09-26 21:44:54,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:44:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-26 21:44:54,969 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2018-09-26 21:44:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:54,969 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-26 21:44:54,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:44:54,969 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-26 21:44:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-26 21:44:54,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:54,970 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-26 21:44:54,970 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:54,970 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:54,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1490448497, now seen corresponding path program 23 times [2018-09-26 21:44:54,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:54,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:54,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:54,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:54,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:55,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:55,505 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 [2018-09-26 21:44:55,513 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:44:55,553 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:44:55,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:55,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:55,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:55,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:44:55,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:44:55,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:44:55,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:55,700 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2018-09-26 21:44:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:57,575 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2018-09-26 21:44:57,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:44:57,575 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2018-09-26 21:44:57,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:57,575 INFO L225 Difference]: With dead ends: 130 [2018-09-26 21:44:57,576 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:44:57,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:57,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:44:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:44:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:44:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-09-26 21:44:57,581 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2018-09-26 21:44:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:57,581 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-09-26 21:44:57,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:44:57,581 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-09-26 21:44:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:44:57,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:57,582 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2018-09-26 21:44:57,582 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:57,582 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:57,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1188334966, now seen corresponding path program 24 times [2018-09-26 21:44:57,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:57,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:57,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:57,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:57,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:57,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:57,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:44:57,955 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:44:57,995 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:44:57,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:44:57,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:58,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:58,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:44:58,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:44:58,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:44:58,132 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:58,132 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 16 states. [2018-09-26 21:44:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:44:58,399 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2018-09-26 21:44:58,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:44:58,399 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2018-09-26 21:44:58,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:44:58,400 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:44:58,400 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:44:58,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:44:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:44:58,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-26 21:44:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:44:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-09-26 21:44:58,407 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2018-09-26 21:44:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:44:58,407 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-09-26 21:44:58,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:44:58,408 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-09-26 21:44:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:44:58,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:44:58,408 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-09-26 21:44:58,408 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:44:58,409 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:44:58,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1190013460, now seen corresponding path program 25 times [2018-09-26 21:44:58,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:44:58,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:44:58,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:58,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:44:58,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:44:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:58,692 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:44:58,692 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) [2018-09-26 21:44:58,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:44:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:44:58,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:44:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:44:58,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:44:58,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:44:58,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:44:58,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:44:58,890 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:44:58,890 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2018-09-26 21:45:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:00,649 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-09-26 21:45:00,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:45:00,650 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2018-09-26 21:45:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:00,650 INFO L225 Difference]: With dead ends: 139 [2018-09-26 21:45:00,651 INFO L226 Difference]: Without dead ends: 76 [2018-09-26 21:45:00,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:00,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-26 21:45:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-26 21:45:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-26 21:45:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-26 21:45:00,659 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2018-09-26 21:45:00,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:00,659 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-26 21:45:00,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:45:00,659 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-26 21:45:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-26 21:45:00,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:00,660 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2018-09-26 21:45:00,660 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:00,660 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:00,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1746112411, now seen corresponding path program 26 times [2018-09-26 21:45:00,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:00,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:00,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:00,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:00,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:00,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:00,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:45:00,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:00,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:00,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:00,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:01,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:01,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-26 21:45:01,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:45:01,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:45:01,054 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:01,054 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 17 states. [2018-09-26 21:45:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:01,360 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2018-09-26 21:45:01,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:45:01,361 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2018-09-26 21:45:01,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:01,361 INFO L225 Difference]: With dead ends: 90 [2018-09-26 21:45:01,362 INFO L226 Difference]: Without dead ends: 84 [2018-09-26 21:45:01,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-26 21:45:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2018-09-26 21:45:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:45:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-26 21:45:01,372 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2018-09-26 21:45:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:01,372 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-26 21:45:01,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:45:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-26 21:45:01,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-26 21:45:01,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:01,373 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-26 21:45:01,373 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:01,373 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:01,374 INFO L82 PathProgramCache]: Analyzing trace with hash 613460315, now seen corresponding path program 27 times [2018-09-26 21:45:01,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:01,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:01,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:01,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:01,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:01,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:01,938 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 [2018-09-26 21:45:01,948 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:01,994 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:45:01,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:01,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:02,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:02,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:45:02,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:45:02,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:45:02,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:02,166 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 32 states. [2018-09-26 21:45:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:03,401 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2018-09-26 21:45:03,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:45:03,401 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2018-09-26 21:45:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:03,402 INFO L225 Difference]: With dead ends: 148 [2018-09-26 21:45:03,402 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:45:03,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:45:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:45:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:45:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-09-26 21:45:03,408 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2018-09-26 21:45:03,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:03,408 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-09-26 21:45:03,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:45:03,408 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-09-26 21:45:03,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:45:03,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:03,409 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2018-09-26 21:45:03,409 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:03,409 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:03,409 INFO L82 PathProgramCache]: Analyzing trace with hash 381727362, now seen corresponding path program 28 times [2018-09-26 21:45:03,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:03,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:03,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:03,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:03,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:03,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:03,666 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 [2018-09-26 21:45:03,675 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:03,707 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:03,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:03,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:03,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:03,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:45:03,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:45:03,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:45:03,906 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:03,906 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 18 states. [2018-09-26 21:45:04,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:04,196 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2018-09-26 21:45:04,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:45:04,196 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2018-09-26 21:45:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:04,197 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:45:04,197 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:45:04,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:45:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2018-09-26 21:45:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:45:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-26 21:45:04,205 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 78 [2018-09-26 21:45:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:04,205 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-26 21:45:04,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:45:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-26 21:45:04,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:45:04,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:04,206 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-26 21:45:04,206 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:04,206 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:04,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1123248904, now seen corresponding path program 29 times [2018-09-26 21:45:04,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:04,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:04,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:04,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:04,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:04,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:04,964 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 [2018-09-26 21:45:04,971 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:05,224 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:45:05,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:05,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:05,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:05,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:45:05,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:45:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:45:05,448 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:05,449 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 34 states. [2018-09-26 21:45:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:07,561 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-09-26 21:45:07,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:45:07,561 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2018-09-26 21:45:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:07,562 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:45:07,562 INFO L226 Difference]: Without dead ends: 86 [2018-09-26 21:45:07,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:07,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-26 21:45:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-26 21:45:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-26 21:45:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-26 21:45:07,571 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2018-09-26 21:45:07,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:07,572 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-26 21:45:07,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:45:07,572 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-26 21:45:07,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:45:07,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:07,572 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2018-09-26 21:45:07,573 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:07,573 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:07,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1191652401, now seen corresponding path program 30 times [2018-09-26 21:45:07,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:07,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:07,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:07,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:07,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:07,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:07,936 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 [2018-09-26 21:45:07,946 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:08,000 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:45:08,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:08,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:08,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:08,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-26 21:45:08,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:45:08,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:45:08,181 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:08,181 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 19 states. [2018-09-26 21:45:08,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:08,520 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2018-09-26 21:45:08,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:45:08,521 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-09-26 21:45:08,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:08,521 INFO L225 Difference]: With dead ends: 100 [2018-09-26 21:45:08,522 INFO L226 Difference]: Without dead ends: 94 [2018-09-26 21:45:08,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:08,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-26 21:45:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2018-09-26 21:45:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-26 21:45:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-09-26 21:45:08,529 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2018-09-26 21:45:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:08,529 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-09-26 21:45:08,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:45:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-09-26 21:45:08,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-26 21:45:08,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:08,530 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-26 21:45:08,530 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:08,531 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:08,531 INFO L82 PathProgramCache]: Analyzing trace with hash 219193127, now seen corresponding path program 31 times [2018-09-26 21:45:08,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:08,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:08,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:08,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:08,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:09,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:09,262 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 [2018-09-26 21:45:09,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:09,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:09,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:09,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:45:09,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:45:09,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:45:09,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:09,627 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 36 states. [2018-09-26 21:45:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:12,475 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2018-09-26 21:45:12,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:45:12,475 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2018-09-26 21:45:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:12,475 INFO L225 Difference]: With dead ends: 166 [2018-09-26 21:45:12,476 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:45:12,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:12,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:45:12,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:45:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:45:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-26 21:45:12,485 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2018-09-26 21:45:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:12,485 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-26 21:45:12,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:45:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-26 21:45:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:45:12,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:12,486 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2018-09-26 21:45:12,486 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:12,486 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:12,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1134517362, now seen corresponding path program 32 times [2018-09-26 21:45:12,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:12,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:12,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:12,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:12,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:12,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:12,857 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 [2018-09-26 21:45:12,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:12,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:12,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:12,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:13,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:13,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:45:13,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:45:13,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:45:13,113 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:13,113 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 20 states. [2018-09-26 21:45:13,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:13,503 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-09-26 21:45:13,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:45:13,503 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2018-09-26 21:45:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:13,504 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:45:13,504 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:45:13,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:45:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-26 21:45:13,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:45:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-26 21:45:13,512 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2018-09-26 21:45:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:13,513 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-26 21:45:13,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:45:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-26 21:45:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:45:13,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:13,514 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-09-26 21:45:13,514 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:13,514 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1074454524, now seen corresponding path program 33 times [2018-09-26 21:45:13,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:13,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:13,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:13,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:13,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:13,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:13,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:45:13,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:13,974 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:45:13,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:13,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:14,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:14,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:45:14,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:45:14,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:45:14,203 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:14,203 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 38 states. [2018-09-26 21:45:17,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:17,148 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-09-26 21:45:17,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:45:17,149 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2018-09-26 21:45:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:17,149 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:45:17,149 INFO L226 Difference]: Without dead ends: 96 [2018-09-26 21:45:17,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:17,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-26 21:45:17,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-26 21:45:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-26 21:45:17,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-09-26 21:45:17,157 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2018-09-26 21:45:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:17,157 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-09-26 21:45:17,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:45:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-09-26 21:45:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-26 21:45:17,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:17,158 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2018-09-26 21:45:17,158 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:17,158 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1513438211, now seen corresponding path program 34 times [2018-09-26 21:45:17,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:17,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:17,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:17,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:17,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:17,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:17,425 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 [2018-09-26 21:45:17,432 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:17,473 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:17,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:17,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:18,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:18,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-26 21:45:18,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:45:18,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:45:18,480 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:18,480 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 21 states. [2018-09-26 21:45:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:19,018 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2018-09-26 21:45:19,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:45:19,019 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2018-09-26 21:45:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:19,020 INFO L225 Difference]: With dead ends: 110 [2018-09-26 21:45:19,020 INFO L226 Difference]: Without dead ends: 104 [2018-09-26 21:45:19,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-26 21:45:19,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2018-09-26 21:45:19,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 21:45:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-26 21:45:19,029 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2018-09-26 21:45:19,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:19,029 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-26 21:45:19,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:45:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-26 21:45:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-26 21:45:19,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:19,030 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-09-26 21:45:19,030 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:19,031 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:19,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1385467661, now seen corresponding path program 35 times [2018-09-26 21:45:19,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:19,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:19,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:19,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:19,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:20,514 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:20,515 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 [2018-09-26 21:45:20,522 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:20,579 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:45:20,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:20,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:20,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:20,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:45:20,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:45:20,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:45:20,845 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:20,846 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 40 states. [2018-09-26 21:45:25,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:25,204 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2018-09-26 21:45:25,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:45:25,204 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 97 [2018-09-26 21:45:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:25,205 INFO L225 Difference]: With dead ends: 184 [2018-09-26 21:45:25,205 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:45:25,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:25,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:45:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:45:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:45:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-26 21:45:25,215 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2018-09-26 21:45:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:25,216 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-26 21:45:25,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:45:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-26 21:45:25,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:45:25,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:25,217 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2018-09-26 21:45:25,217 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:25,217 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:25,217 INFO L82 PathProgramCache]: Analyzing trace with hash -209035110, now seen corresponding path program 36 times [2018-09-26 21:45:25,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:25,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:25,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:25,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:25,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:25,467 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:25,467 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 [2018-09-26 21:45:25,477 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:25,540 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:45:25,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:25,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:25,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:25,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:45:25,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:45:25,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:45:25,775 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:25,775 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 22 states. [2018-09-26 21:45:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:26,205 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2018-09-26 21:45:26,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:45:26,205 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2018-09-26 21:45:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:26,206 INFO L225 Difference]: With dead ends: 115 [2018-09-26 21:45:26,206 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:45:26,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:45:26,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2018-09-26 21:45:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:45:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-26 21:45:26,217 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2018-09-26 21:45:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:26,217 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-26 21:45:26,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:45:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-26 21:45:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:45:26,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:26,218 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-09-26 21:45:26,219 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:26,219 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:26,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1566476528, now seen corresponding path program 37 times [2018-09-26 21:45:26,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:26,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:26,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:26,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:26,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:27,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:27,675 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 [2018-09-26 21:45:27,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:27,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:28,008 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:28,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:45:28,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:45:28,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:45:28,009 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:28,009 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 42 states. [2018-09-26 21:45:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:31,468 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-09-26 21:45:31,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:45:31,468 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 102 [2018-09-26 21:45:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:31,469 INFO L225 Difference]: With dead ends: 193 [2018-09-26 21:45:31,469 INFO L226 Difference]: Without dead ends: 106 [2018-09-26 21:45:31,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-26 21:45:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-26 21:45:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-26 21:45:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-26 21:45:31,481 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2018-09-26 21:45:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:31,481 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-26 21:45:31,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:45:31,481 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-26 21:45:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-26 21:45:31,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:31,482 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2018-09-26 21:45:31,482 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:31,483 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:31,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1920546761, now seen corresponding path program 38 times [2018-09-26 21:45:31,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:31,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:31,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:31,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:31,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:32,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:32,137 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 [2018-09-26 21:45:32,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:32,192 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:32,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:32,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:32,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:32,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-26 21:45:32,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:45:32,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:45:32,581 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:32,581 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 23 states. [2018-09-26 21:45:32,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:32,946 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2018-09-26 21:45:32,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:45:32,946 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 103 [2018-09-26 21:45:32,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:32,947 INFO L225 Difference]: With dead ends: 120 [2018-09-26 21:45:32,948 INFO L226 Difference]: Without dead ends: 114 [2018-09-26 21:45:32,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-26 21:45:32,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2018-09-26 21:45:32,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-26 21:45:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-26 21:45:32,959 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2018-09-26 21:45:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:32,959 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-26 21:45:32,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:45:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-26 21:45:32,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-26 21:45:32,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:32,960 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-09-26 21:45:32,961 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:32,961 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:32,961 INFO L82 PathProgramCache]: Analyzing trace with hash -756867393, now seen corresponding path program 39 times [2018-09-26 21:45:32,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:32,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:32,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:32,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:32,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:33,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:33,530 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 [2018-09-26 21:45:33,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:33,607 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:45:33,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:33,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:35,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:35,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:45:35,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:45:35,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:45:35,042 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:35,042 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 44 states. [2018-09-26 21:45:38,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:38,862 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2018-09-26 21:45:38,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:45:38,863 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 107 [2018-09-26 21:45:38,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:38,863 INFO L225 Difference]: With dead ends: 202 [2018-09-26 21:45:38,863 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:45:38,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:38,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:45:38,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-26 21:45:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:45:38,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-09-26 21:45:38,873 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2018-09-26 21:45:38,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:38,873 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-09-26 21:45:38,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:45:38,874 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-09-26 21:45:38,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:45:38,874 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:38,874 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2018-09-26 21:45:38,874 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:38,874 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:38,875 INFO L82 PathProgramCache]: Analyzing trace with hash 798222758, now seen corresponding path program 40 times [2018-09-26 21:45:38,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:38,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:38,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:38,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:38,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:40,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:40,150 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 [2018-09-26 21:45:40,158 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:40,207 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:40,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:40,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:40,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:40,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:45:40,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:45:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:45:40,438 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:40,439 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 24 states. [2018-09-26 21:45:40,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:40,808 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2018-09-26 21:45:40,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:45:40,808 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 108 [2018-09-26 21:45:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:40,809 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:45:40,810 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:45:40,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:45:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-26 21:45:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:45:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-26 21:45:40,823 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2018-09-26 21:45:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:40,823 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-26 21:45:40,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:45:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-26 21:45:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:45:40,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:40,824 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-09-26 21:45:40,825 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:40,825 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1030199836, now seen corresponding path program 41 times [2018-09-26 21:45:40,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:40,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:40,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:40,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:40,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:41,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:41,709 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 [2018-09-26 21:45:41,720 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:45:41,795 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:45:41,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:41,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:42,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:42,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:45:42,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:45:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:45:42,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:42,168 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 46 states. [2018-09-26 21:45:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:46,433 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-09-26 21:45:46,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:45:46,433 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 112 [2018-09-26 21:45:46,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:46,433 INFO L225 Difference]: With dead ends: 211 [2018-09-26 21:45:46,433 INFO L226 Difference]: Without dead ends: 116 [2018-09-26 21:45:46,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:46,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-26 21:45:46,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-26 21:45:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-26 21:45:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-09-26 21:45:46,445 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 112 [2018-09-26 21:45:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:46,445 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-09-26 21:45:46,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:45:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-09-26 21:45:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-26 21:45:46,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:46,446 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2018-09-26 21:45:46,447 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:46,447 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:46,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1949005931, now seen corresponding path program 42 times [2018-09-26 21:45:46,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:46,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:46,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:46,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:46,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:47,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:47,193 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 [2018-09-26 21:45:47,202 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:45:47,294 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-26 21:45:47,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:47,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:47,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:47,570 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-26 21:45:47,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:45:47,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:45:47,571 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:47,571 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 25 states. [2018-09-26 21:45:48,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:48,136 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2018-09-26 21:45:48,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:45:48,136 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2018-09-26 21:45:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:48,137 INFO L225 Difference]: With dead ends: 130 [2018-09-26 21:45:48,137 INFO L226 Difference]: Without dead ends: 124 [2018-09-26 21:45:48,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-26 21:45:48,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2018-09-26 21:45:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-26 21:45:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-09-26 21:45:48,150 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2018-09-26 21:45:48,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:48,150 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-09-26 21:45:48,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:45:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-09-26 21:45:48,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-26 21:45:48,151 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:48,151 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-09-26 21:45:48,151 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:48,151 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:48,151 INFO L82 PathProgramCache]: Analyzing trace with hash 725198987, now seen corresponding path program 43 times [2018-09-26 21:45:48,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:48,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:48,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:48,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:48,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:48,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:48,741 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 [2018-09-26 21:45:48,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:48,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:49,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:49,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:45:49,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:45:49,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:45:49,083 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:49,083 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 48 states. [2018-09-26 21:45:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:51,778 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2018-09-26 21:45:51,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:45:51,778 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 117 [2018-09-26 21:45:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:51,779 INFO L225 Difference]: With dead ends: 220 [2018-09-26 21:45:51,779 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:45:51,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:45:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:45:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:45:51,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-26 21:45:51,788 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 117 [2018-09-26 21:45:51,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:51,788 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-26 21:45:51,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:45:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-26 21:45:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:45:51,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:51,789 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2018-09-26 21:45:51,790 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:51,790 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:51,790 INFO L82 PathProgramCache]: Analyzing trace with hash 995311282, now seen corresponding path program 44 times [2018-09-26 21:45:51,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:51,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:51,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:51,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:45:51,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:51,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:52,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:52,234 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 [2018-09-26 21:45:52,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:45:52,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:45:52,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:52,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:52,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:52,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:45:52,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:45:52,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:45:52,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:52,721 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 26 states. [2018-09-26 21:45:53,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:53,297 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-09-26 21:45:53,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:45:53,298 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2018-09-26 21:45:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:53,299 INFO L225 Difference]: With dead ends: 135 [2018-09-26 21:45:53,299 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 21:45:53,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 21:45:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2018-09-26 21:45:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:45:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-09-26 21:45:53,311 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2018-09-26 21:45:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:53,312 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-09-26 21:45:53,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:45:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-09-26 21:45:53,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:45:53,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:53,313 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-09-26 21:45:53,313 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:53,313 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:53,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1935656, now seen corresponding path program 45 times [2018-09-26 21:45:53,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:53,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:53,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:53,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:53,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:54,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:54,110 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 [2018-09-26 21:45:54,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:45:54,201 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:45:54,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:54,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:54,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:54,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:45:54,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:45:54,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:45:54,481 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:54,481 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 50 states. [2018-09-26 21:45:58,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:58,586 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-09-26 21:45:58,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:45:58,586 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2018-09-26 21:45:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:58,586 INFO L225 Difference]: With dead ends: 229 [2018-09-26 21:45:58,587 INFO L226 Difference]: Without dead ends: 126 [2018-09-26 21:45:58,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-26 21:45:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-26 21:45:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-26 21:45:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2018-09-26 21:45:58,597 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 122 [2018-09-26 21:45:58,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:58,598 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2018-09-26 21:45:58,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:45:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2018-09-26 21:45:58,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-26 21:45:58,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:58,599 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2018-09-26 21:45:58,599 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:58,599 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:58,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1360966497, now seen corresponding path program 46 times [2018-09-26 21:45:58,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:58,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:58,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:58,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:58,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:45:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:58,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:45:58,915 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 [2018-09-26 21:45:58,923 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:45:58,982 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:45:58,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:45:58,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:45:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:45:59,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:45:59,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-26 21:45:59,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:45:59,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:45:59,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:45:59,308 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 27 states. [2018-09-26 21:45:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:45:59,727 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2018-09-26 21:45:59,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:45:59,727 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2018-09-26 21:45:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:45:59,728 INFO L225 Difference]: With dead ends: 140 [2018-09-26 21:45:59,728 INFO L226 Difference]: Without dead ends: 134 [2018-09-26 21:45:59,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:45:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-26 21:45:59,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2018-09-26 21:45:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-26 21:45:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-09-26 21:45:59,741 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2018-09-26 21:45:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:45:59,741 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-09-26 21:45:59,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:45:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-09-26 21:45:59,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-26 21:45:59,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:45:59,742 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-09-26 21:45:59,742 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:45:59,742 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:45:59,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1531900329, now seen corresponding path program 47 times [2018-09-26 21:45:59,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:45:59,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:45:59,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:59,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:45:59,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:45:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:00,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:00,347 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 [2018-09-26 21:46:00,355 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:00,432 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:46:00,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:00,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:00,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:00,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:46:00,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:46:00,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:46:00,716 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:00,716 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 52 states. [2018-09-26 21:46:06,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:06,010 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2018-09-26 21:46:06,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:46:06,010 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 127 [2018-09-26 21:46:06,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:06,011 INFO L225 Difference]: With dead ends: 238 [2018-09-26 21:46:06,011 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:46:06,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:06,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:46:06,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 21:46:06,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:46:06,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-26 21:46:06,023 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2018-09-26 21:46:06,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:06,023 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-26 21:46:06,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:46:06,023 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-26 21:46:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:46:06,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:06,024 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2018-09-26 21:46:06,024 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:06,024 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:06,024 INFO L82 PathProgramCache]: Analyzing trace with hash -652320834, now seen corresponding path program 48 times [2018-09-26 21:46:06,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:06,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:06,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:06,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:06,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:06,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:06,335 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 [2018-09-26 21:46:06,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:06,425 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:46:06,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:06,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:06,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:06,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:46:06,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:46:06,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:46:06,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:06,721 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 28 states. [2018-09-26 21:46:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:07,192 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2018-09-26 21:46:07,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:46:07,192 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 128 [2018-09-26 21:46:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:07,193 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:46:07,193 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:46:07,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:46:07,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-26 21:46:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:46:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-09-26 21:46:07,203 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 128 [2018-09-26 21:46:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:07,203 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-09-26 21:46:07,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:46:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-09-26 21:46:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:46:07,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:07,204 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-09-26 21:46:07,204 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:07,204 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:07,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1843837900, now seen corresponding path program 49 times [2018-09-26 21:46:07,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:07,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:07,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:07,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:07,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:07,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:07,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:46:07,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:07,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:09,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:09,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:46:09,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:46:09,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:46:09,204 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:09,204 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 54 states. [2018-09-26 21:46:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:11,239 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-09-26 21:46:11,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:46:11,239 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 132 [2018-09-26 21:46:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:11,240 INFO L225 Difference]: With dead ends: 247 [2018-09-26 21:46:11,240 INFO L226 Difference]: Without dead ends: 136 [2018-09-26 21:46:11,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-26 21:46:11,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-26 21:46:11,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-26 21:46:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-26 21:46:11,250 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-09-26 21:46:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:11,251 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-26 21:46:11,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:46:11,251 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-26 21:46:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-26 21:46:11,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:11,251 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2018-09-26 21:46:11,251 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:11,252 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:11,252 INFO L82 PathProgramCache]: Analyzing trace with hash 35240749, now seen corresponding path program 50 times [2018-09-26 21:46:11,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:11,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:11,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:11,252 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:11,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:11,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:11,554 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 [2018-09-26 21:46:11,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:11,621 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:11,621 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:11,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:12,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:12,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-26 21:46:12,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:46:12,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:46:12,094 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:12,094 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 29 states. [2018-09-26 21:46:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:12,574 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2018-09-26 21:46:12,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:46:12,574 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 133 [2018-09-26 21:46:12,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:12,575 INFO L225 Difference]: With dead ends: 150 [2018-09-26 21:46:12,575 INFO L226 Difference]: Without dead ends: 144 [2018-09-26 21:46:12,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:12,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-26 21:46:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2018-09-26 21:46:12,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-26 21:46:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-09-26 21:46:12,586 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2018-09-26 21:46:12,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:12,587 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-09-26 21:46:12,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:46:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-09-26 21:46:12,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-26 21:46:12,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:12,587 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-09-26 21:46:12,588 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:12,588 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:12,588 INFO L82 PathProgramCache]: Analyzing trace with hash -838119389, now seen corresponding path program 51 times [2018-09-26 21:46:12,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:12,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:12,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:12,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:12,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:13,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:13,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:46:13,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:13,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:46:13,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:13,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:13,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:13,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:46:13,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:46:13,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:46:13,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:13,743 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 56 states. [2018-09-26 21:46:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:19,762 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2018-09-26 21:46:19,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:46:19,762 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 137 [2018-09-26 21:46:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:19,763 INFO L225 Difference]: With dead ends: 256 [2018-09-26 21:46:19,763 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 21:46:19,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 21:46:19,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 21:46:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 21:46:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-09-26 21:46:19,775 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 137 [2018-09-26 21:46:19,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:19,776 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-09-26 21:46:19,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:46:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-09-26 21:46:19,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:46:19,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:19,776 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2018-09-26 21:46:19,776 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:19,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1657490634, now seen corresponding path program 52 times [2018-09-26 21:46:19,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:19,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:19,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:19,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:19,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:20,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:20,245 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 [2018-09-26 21:46:20,255 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:20,309 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:20,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:20,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:20,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:20,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:46:20,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:46:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:46:20,784 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:20,784 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 30 states. [2018-09-26 21:46:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:21,241 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2018-09-26 21:46:21,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:46:21,241 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 138 [2018-09-26 21:46:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:21,242 INFO L225 Difference]: With dead ends: 155 [2018-09-26 21:46:21,242 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:46:21,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:21,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:46:21,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2018-09-26 21:46:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:46:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-26 21:46:21,255 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 138 [2018-09-26 21:46:21,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:21,256 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-26 21:46:21,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:46:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-26 21:46:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-26 21:46:21,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:21,257 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1] [2018-09-26 21:46:21,257 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:21,257 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1915800384, now seen corresponding path program 53 times [2018-09-26 21:46:21,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:21,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:21,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:21,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:21,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:22,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:22,060 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 [2018-09-26 21:46:22,070 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:22,161 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:46:22,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:22,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:22,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:22,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:46:22,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:46:22,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:46:22,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:22,575 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 58 states. [2018-09-26 21:46:29,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:29,294 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2018-09-26 21:46:29,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:46:29,294 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 142 [2018-09-26 21:46:29,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:29,295 INFO L225 Difference]: With dead ends: 265 [2018-09-26 21:46:29,295 INFO L226 Difference]: Without dead ends: 146 [2018-09-26 21:46:29,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-26 21:46:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-26 21:46:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-26 21:46:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2018-09-26 21:46:29,306 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 142 [2018-09-26 21:46:29,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:29,307 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2018-09-26 21:46:29,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:46:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2018-09-26 21:46:29,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-26 21:46:29,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:29,308 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2018-09-26 21:46:29,308 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:29,308 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash 520593145, now seen corresponding path program 54 times [2018-09-26 21:46:29,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:29,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:29,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:29,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:29,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:29,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:29,609 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 [2018-09-26 21:46:29,617 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:46:29,706 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-26 21:46:29,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:29,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:30,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:30,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-26 21:46:30,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:46:30,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:46:30,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:30,041 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 31 states. [2018-09-26 21:46:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:30,537 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2018-09-26 21:46:30,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:46:30,538 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 143 [2018-09-26 21:46:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:30,539 INFO L225 Difference]: With dead ends: 160 [2018-09-26 21:46:30,539 INFO L226 Difference]: Without dead ends: 154 [2018-09-26 21:46:30,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-26 21:46:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2018-09-26 21:46:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-26 21:46:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-09-26 21:46:30,551 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2018-09-26 21:46:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:30,551 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-09-26 21:46:30,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:46:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-09-26 21:46:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-26 21:46:30,552 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:30,552 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1] [2018-09-26 21:46:30,552 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:30,552 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:30,552 INFO L82 PathProgramCache]: Analyzing trace with hash 915041775, now seen corresponding path program 55 times [2018-09-26 21:46:30,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:30,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:30,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:30,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:30,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:31,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:31,216 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 [2018-09-26 21:46:31,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:31,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:31,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:31,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:46:31,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:46:31,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:46:31,770 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:31,770 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 60 states. [2018-09-26 21:46:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:38,930 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2018-09-26 21:46:38,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:46:38,931 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 147 [2018-09-26 21:46:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:38,932 INFO L225 Difference]: With dead ends: 274 [2018-09-26 21:46:38,932 INFO L226 Difference]: Without dead ends: 151 [2018-09-26 21:46:38,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:38,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-26 21:46:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-26 21:46:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-26 21:46:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-26 21:46:38,948 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2018-09-26 21:46:38,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:38,949 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-26 21:46:38,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:46:38,949 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-26 21:46:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:46:38,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:38,950 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1] [2018-09-26 21:46:38,950 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:38,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1773143510, now seen corresponding path program 56 times [2018-09-26 21:46:38,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:38,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:38,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:38,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:38,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:39,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:39,310 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 [2018-09-26 21:46:39,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:46:39,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:46:39,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:39,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:39,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:39,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:46:39,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:46:39,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:46:39,692 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:39,692 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 32 states. [2018-09-26 21:46:40,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:40,262 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-09-26 21:46:40,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:46:40,262 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 148 [2018-09-26 21:46:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:40,263 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:46:40,263 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:46:40,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:46:40,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-09-26 21:46:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:46:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-26 21:46:40,276 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 148 [2018-09-26 21:46:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:40,276 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-26 21:46:40,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:46:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-26 21:46:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:46:40,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:40,277 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1] [2018-09-26 21:46:40,277 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:40,277 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:40,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1766187444, now seen corresponding path program 57 times [2018-09-26 21:46:40,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:40,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:40,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:40,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:40,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:40,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:40,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:46:40,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:46:41,097 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-26 21:46:41,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:41,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:41,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:41,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:46:41,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:46:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:46:41,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:41,493 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 62 states. [2018-09-26 21:46:49,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:49,226 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2018-09-26 21:46:49,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:46:49,226 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 152 [2018-09-26 21:46:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:49,226 INFO L225 Difference]: With dead ends: 283 [2018-09-26 21:46:49,227 INFO L226 Difference]: Without dead ends: 156 [2018-09-26 21:46:49,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:49,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-26 21:46:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-26 21:46:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-26 21:46:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2018-09-26 21:46:49,239 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 152 [2018-09-26 21:46:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:49,239 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2018-09-26 21:46:49,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:46:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2018-09-26 21:46:49,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-26 21:46:49,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:49,240 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2018-09-26 21:46:49,240 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:49,240 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:49,240 INFO L82 PathProgramCache]: Analyzing trace with hash -928358715, now seen corresponding path program 58 times [2018-09-26 21:46:49,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:49,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:49,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:49,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:49,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:49,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:49,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:49,619 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 [2018-09-26 21:46:49,629 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:46:49,702 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:46:49,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:49,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:50,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:50,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-26 21:46:50,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:46:50,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:46:50,075 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:50,075 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 33 states. [2018-09-26 21:46:50,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:50,743 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2018-09-26 21:46:50,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:46:50,744 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 153 [2018-09-26 21:46:50,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:50,745 INFO L225 Difference]: With dead ends: 170 [2018-09-26 21:46:50,745 INFO L226 Difference]: Without dead ends: 164 [2018-09-26 21:46:50,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:50,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-26 21:46:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2018-09-26 21:46:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-26 21:46:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-09-26 21:46:50,763 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 153 [2018-09-26 21:46:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:50,763 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-09-26 21:46:50,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:46:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-09-26 21:46:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-26 21:46:50,764 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:50,764 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1] [2018-09-26 21:46:50,764 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:50,765 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:50,765 INFO L82 PathProgramCache]: Analyzing trace with hash -839882821, now seen corresponding path program 59 times [2018-09-26 21:46:50,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:50,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:50,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:50,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:50,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:51,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:51,509 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 [2018-09-26 21:46:51,517 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:46:51,612 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:46:51,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:51,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:51,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:51,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:46:51,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:46:51,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:46:51,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:51,995 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 64 states. [2018-09-26 21:46:57,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:57,512 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2018-09-26 21:46:57,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:46:57,512 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 157 [2018-09-26 21:46:57,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:57,513 INFO L225 Difference]: With dead ends: 292 [2018-09-26 21:46:57,513 INFO L226 Difference]: Without dead ends: 161 [2018-09-26 21:46:57,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:57,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-26 21:46:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-26 21:46:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-26 21:46:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-26 21:46:57,530 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 157 [2018-09-26 21:46:57,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:57,530 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-26 21:46:57,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:46:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-26 21:46:57,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-26 21:46:57,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:57,531 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1] [2018-09-26 21:46:57,531 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:57,531 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:57,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1453492962, now seen corresponding path program 60 times [2018-09-26 21:46:57,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:57,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:57,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:57,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:57,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:57,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:57,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-26 21:46:57,913 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:46:58,057 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:46:58,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:46:58,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:46:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:58,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:46:58,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:46:58,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:46:58,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:46:58,381 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:46:58,381 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 34 states. [2018-09-26 21:46:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:46:58,911 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2018-09-26 21:46:58,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:46:58,912 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 158 [2018-09-26 21:46:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:46:58,912 INFO L225 Difference]: With dead ends: 175 [2018-09-26 21:46:58,913 INFO L226 Difference]: Without dead ends: 169 [2018-09-26 21:46:58,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:46:58,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-26 21:46:58,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-09-26 21:46:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-26 21:46:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-09-26 21:46:58,931 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 158 [2018-09-26 21:46:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:46:58,932 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-09-26 21:46:58,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:46:58,932 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-09-26 21:46:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-26 21:46:58,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:46:58,933 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1] [2018-09-26 21:46:58,933 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:46:58,933 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:46:58,933 INFO L82 PathProgramCache]: Analyzing trace with hash 227229016, now seen corresponding path program 61 times [2018-09-26 21:46:58,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:46:58,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:46:58,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:58,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:46:58,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:46:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:59,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:46:59,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:46:59,843 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 [2018-09-26 21:46:59,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:46:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:46:59,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:00,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:00,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:47:00,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:47:00,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:47:00,310 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:00,310 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 66 states. [2018-09-26 21:47:07,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:07,903 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2018-09-26 21:47:07,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:47:07,903 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 162 [2018-09-26 21:47:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:07,904 INFO L225 Difference]: With dead ends: 301 [2018-09-26 21:47:07,904 INFO L226 Difference]: Without dead ends: 166 [2018-09-26 21:47:07,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-26 21:47:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-26 21:47:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-26 21:47:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-09-26 21:47:07,923 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 162 [2018-09-26 21:47:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:07,923 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-09-26 21:47:07,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:47:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-09-26 21:47:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-26 21:47:07,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:07,925 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 1, 1, 1, 1, 1] [2018-09-26 21:47:07,925 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:07,925 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash 541325969, now seen corresponding path program 62 times [2018-09-26 21:47:07,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:07,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:07,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:07,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:07,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:08,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:08,301 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 [2018-09-26 21:47:08,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:47:08,384 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:47:08,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:08,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:08,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:08,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-26 21:47:08,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:47:08,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:47:08,732 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:08,733 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 35 states. [2018-09-26 21:47:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:09,339 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2018-09-26 21:47:09,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:47:09,339 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 163 [2018-09-26 21:47:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:09,340 INFO L225 Difference]: With dead ends: 180 [2018-09-26 21:47:09,340 INFO L226 Difference]: Without dead ends: 174 [2018-09-26 21:47:09,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:09,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-09-26 21:47:09,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2018-09-26 21:47:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-26 21:47:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2018-09-26 21:47:09,357 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 163 [2018-09-26 21:47:09,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:09,357 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2018-09-26 21:47:09,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:47:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2018-09-26 21:47:09,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-26 21:47:09,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:09,358 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1] [2018-09-26 21:47:09,358 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:09,358 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:09,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1149189511, now seen corresponding path program 63 times [2018-09-26 21:47:09,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:09,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:09,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:09,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:09,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:10,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:10,353 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 [2018-09-26 21:47:10,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:47:10,482 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-26 21:47:10,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:10,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:10,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:10,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:47:10,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:47:10,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:47:10,971 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:10,971 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 68 states. [2018-09-26 21:47:13,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:13,758 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2018-09-26 21:47:13,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:47:13,758 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 167 [2018-09-26 21:47:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:13,759 INFO L225 Difference]: With dead ends: 310 [2018-09-26 21:47:13,759 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:47:13,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:13,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:47:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-26 21:47:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-26 21:47:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-26 21:47:13,774 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-09-26 21:47:13,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:13,774 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-26 21:47:13,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:47:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-26 21:47:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-26 21:47:13,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:13,775 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 1, 1, 1, 1, 1] [2018-09-26 21:47:13,776 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:13,776 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:13,776 INFO L82 PathProgramCache]: Analyzing trace with hash 167304174, now seen corresponding path program 64 times [2018-09-26 21:47:13,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:13,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:13,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:13,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:13,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:14,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:14,404 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 [2018-09-26 21:47:14,412 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:47:14,489 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:47:14,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:14,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:14,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:14,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:47:14,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:47:14,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:47:14,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:14,911 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 36 states. [2018-09-26 21:47:15,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:15,580 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2018-09-26 21:47:15,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:47:15,581 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 168 [2018-09-26 21:47:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:15,582 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:47:15,582 INFO L226 Difference]: Without dead ends: 179 [2018-09-26 21:47:15,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-26 21:47:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-09-26 21:47:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-26 21:47:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-26 21:47:15,602 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 168 [2018-09-26 21:47:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:15,602 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-26 21:47:15,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:47:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-26 21:47:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-26 21:47:15,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:15,604 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1] [2018-09-26 21:47:15,604 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:15,604 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1678104476, now seen corresponding path program 65 times [2018-09-26 21:47:15,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:15,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:15,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:15,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:15,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:16,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:16,505 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 [2018-09-26 21:47:16,512 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:47:16,632 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-26 21:47:16,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:16,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:17,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:17,279 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:47:17,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:47:17,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:47:17,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:17,280 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 70 states. [2018-09-26 21:47:27,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:27,252 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2018-09-26 21:47:27,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:47:27,252 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 172 [2018-09-26 21:47:27,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:27,253 INFO L225 Difference]: With dead ends: 319 [2018-09-26 21:47:27,253 INFO L226 Difference]: Without dead ends: 176 [2018-09-26 21:47:27,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:27,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-26 21:47:27,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-26 21:47:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-26 21:47:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-09-26 21:47:27,274 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 172 [2018-09-26 21:47:27,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:27,274 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-09-26 21:47:27,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:47:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-09-26 21:47:27,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-26 21:47:27,275 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:27,275 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2018-09-26 21:47:27,275 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:27,275 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:27,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1483312547, now seen corresponding path program 66 times [2018-09-26 21:47:27,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:27,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:27,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:27,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:27,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:27,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:27,668 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 [2018-09-26 21:47:27,677 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:47:27,794 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-26 21:47:27,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:27,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:28,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:28,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-26 21:47:28,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:47:28,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:47:28,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:28,156 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 37 states. [2018-09-26 21:47:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:28,754 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2018-09-26 21:47:28,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:47:28,754 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 173 [2018-09-26 21:47:28,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:28,755 INFO L225 Difference]: With dead ends: 190 [2018-09-26 21:47:28,755 INFO L226 Difference]: Without dead ends: 184 [2018-09-26 21:47:28,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-26 21:47:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2018-09-26 21:47:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-26 21:47:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2018-09-26 21:47:28,776 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 173 [2018-09-26 21:47:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:28,777 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2018-09-26 21:47:28,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:47:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2018-09-26 21:47:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-09-26 21:47:28,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:28,778 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1] [2018-09-26 21:47:28,778 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:28,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:28,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1794699091, now seen corresponding path program 67 times [2018-09-26 21:47:28,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:28,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:28,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:28,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:28,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:29,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:29,696 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 [2018-09-26 21:47:29,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:29,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:30,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:30,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:47:30,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:47:30,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:47:30,335 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:30,335 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 72 states. [2018-09-26 21:47:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:41,013 INFO L93 Difference]: Finished difference Result 328 states and 332 transitions. [2018-09-26 21:47:41,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:47:41,013 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 177 [2018-09-26 21:47:41,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:41,014 INFO L225 Difference]: With dead ends: 328 [2018-09-26 21:47:41,014 INFO L226 Difference]: Without dead ends: 181 [2018-09-26 21:47:41,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-26 21:47:41,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-26 21:47:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:47:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-26 21:47:41,030 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 177 [2018-09-26 21:47:41,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:41,030 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-26 21:47:41,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:47:41,030 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-26 21:47:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-26 21:47:41,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:41,031 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 1, 1, 1, 1, 1] [2018-09-26 21:47:41,031 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:41,032 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:41,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2072574202, now seen corresponding path program 68 times [2018-09-26 21:47:41,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:41,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:41,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:41,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:47:41,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:41,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:41,544 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 [2018-09-26 21:47:41,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:47:41,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:47:41,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:41,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:42,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:42,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:47:42,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:47:42,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:47:42,020 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:42,020 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 38 states. [2018-09-26 21:47:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:42,690 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-09-26 21:47:42,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:47:42,691 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 178 [2018-09-26 21:47:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:42,692 INFO L225 Difference]: With dead ends: 195 [2018-09-26 21:47:42,692 INFO L226 Difference]: Without dead ends: 189 [2018-09-26 21:47:42,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-26 21:47:42,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2018-09-26 21:47:42,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-26 21:47:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-26 21:47:42,706 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 178 [2018-09-26 21:47:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:42,706 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-26 21:47:42,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:47:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-26 21:47:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-26 21:47:42,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:42,707 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1] [2018-09-26 21:47:42,707 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:42,707 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:42,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1591533424, now seen corresponding path program 69 times [2018-09-26 21:47:42,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:42,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:42,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:42,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:42,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:43,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:43,713 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 [2018-09-26 21:47:43,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:47:43,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:47:43,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:43,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:44,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:44,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:47:44,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:47:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:47:44,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:44,324 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 74 states. [2018-09-26 21:47:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:55,643 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2018-09-26 21:47:55,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:47:55,643 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 182 [2018-09-26 21:47:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:55,644 INFO L225 Difference]: With dead ends: 337 [2018-09-26 21:47:55,644 INFO L226 Difference]: Without dead ends: 186 [2018-09-26 21:47:55,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-26 21:47:55,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-09-26 21:47:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-09-26 21:47:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2018-09-26 21:47:55,658 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 182 [2018-09-26 21:47:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:55,658 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2018-09-26 21:47:55,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:47:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2018-09-26 21:47:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-26 21:47:55,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:55,659 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1] [2018-09-26 21:47:55,659 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:55,659 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:55,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1595685335, now seen corresponding path program 70 times [2018-09-26 21:47:55,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:55,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:55,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:55,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:55,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:56,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:56,246 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 [2018-09-26 21:47:56,253 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:47:56,336 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:47:56,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:56,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:56,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:56,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-26 21:47:56,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:47:56,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:47:56,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:56,761 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 39 states. [2018-09-26 21:47:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:47:57,512 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2018-09-26 21:47:57,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:47:57,512 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 183 [2018-09-26 21:47:57,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:47:57,513 INFO L225 Difference]: With dead ends: 200 [2018-09-26 21:47:57,513 INFO L226 Difference]: Without dead ends: 194 [2018-09-26 21:47:57,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:47:57,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-26 21:47:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2018-09-26 21:47:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-26 21:47:57,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-09-26 21:47:57,530 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 183 [2018-09-26 21:47:57,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:47:57,530 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-09-26 21:47:57,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:47:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-09-26 21:47:57,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-09-26 21:47:57,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:47:57,531 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1] [2018-09-26 21:47:57,531 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:47:57,531 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:47:57,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1835041505, now seen corresponding path program 71 times [2018-09-26 21:47:57,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:47:57,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:47:57,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:57,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:47:57,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:47:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:47:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:58,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:47:58,531 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 [2018-09-26 21:47:58,539 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:47:58,656 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:47:58,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:47:58,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:47:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:47:59,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:47:59,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:47:59,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:47:59,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:47:59,100 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:47:59,100 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 76 states. [2018-09-26 21:48:07,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:07,411 INFO L93 Difference]: Finished difference Result 346 states and 350 transitions. [2018-09-26 21:48:07,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:48:07,411 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 187 [2018-09-26 21:48:07,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:07,412 INFO L225 Difference]: With dead ends: 346 [2018-09-26 21:48:07,412 INFO L226 Difference]: Without dead ends: 191 [2018-09-26 21:48:07,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:07,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-26 21:48:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-26 21:48:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-26 21:48:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-26 21:48:07,435 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 187 [2018-09-26 21:48:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:07,435 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-26 21:48:07,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:48:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-26 21:48:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-26 21:48:07,436 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:07,436 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 1, 1, 1, 1, 1] [2018-09-26 21:48:07,437 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:07,437 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1521017350, now seen corresponding path program 72 times [2018-09-26 21:48:07,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:07,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:07,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:07,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:07,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:07,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:07,890 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 [2018-09-26 21:48:07,897 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:48:08,028 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:48:08,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:08,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:08,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:08,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:48:08,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:48:08,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:48:08,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:08,425 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 40 states. [2018-09-26 21:48:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:09,156 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2018-09-26 21:48:09,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:48:09,157 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 188 [2018-09-26 21:48:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:09,158 INFO L225 Difference]: With dead ends: 205 [2018-09-26 21:48:09,158 INFO L226 Difference]: Without dead ends: 199 [2018-09-26 21:48:09,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-26 21:48:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-09-26 21:48:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-26 21:48:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-09-26 21:48:09,181 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 188 [2018-09-26 21:48:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:09,181 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-09-26 21:48:09,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:48:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-09-26 21:48:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-26 21:48:09,182 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:09,183 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1] [2018-09-26 21:48:09,183 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:09,183 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:09,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1787388540, now seen corresponding path program 73 times [2018-09-26 21:48:09,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:09,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:09,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:09,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:09,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:10,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:10,262 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 [2018-09-26 21:48:10,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:10,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:10,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:10,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:10,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:48:10,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:48:10,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:48:10,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:10,835 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 78 states. [2018-09-26 21:48:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:18,937 INFO L93 Difference]: Finished difference Result 355 states and 359 transitions. [2018-09-26 21:48:18,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:48:18,938 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 192 [2018-09-26 21:48:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:18,938 INFO L225 Difference]: With dead ends: 355 [2018-09-26 21:48:18,938 INFO L226 Difference]: Without dead ends: 196 [2018-09-26 21:48:18,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:18,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-26 21:48:18,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-26 21:48:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-26 21:48:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-09-26 21:48:18,961 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 192 [2018-09-26 21:48:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:18,961 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-09-26 21:48:18,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:48:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-09-26 21:48:18,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-26 21:48:18,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:18,962 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 1, 1, 1, 1, 1] [2018-09-26 21:48:18,962 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:18,963 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:18,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1861088757, now seen corresponding path program 74 times [2018-09-26 21:48:18,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:18,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:18,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:18,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:48:18,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:19,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:19,418 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 [2018-09-26 21:48:19,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:48:19,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:48:19,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:19,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:19,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:19,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-26 21:48:19,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:48:19,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:48:19,936 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:19,936 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 41 states. [2018-09-26 21:48:20,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:48:20,665 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2018-09-26 21:48:20,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:48:20,665 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 193 [2018-09-26 21:48:20,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:48:20,666 INFO L225 Difference]: With dead ends: 210 [2018-09-26 21:48:20,666 INFO L226 Difference]: Without dead ends: 204 [2018-09-26 21:48:20,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:48:20,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-09-26 21:48:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2018-09-26 21:48:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-26 21:48:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-09-26 21:48:20,682 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 193 [2018-09-26 21:48:20,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:48:20,682 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-09-26 21:48:20,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:48:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-09-26 21:48:20,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-26 21:48:20,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:48:20,683 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 1, 1, 1, 1, 1] [2018-09-26 21:48:20,684 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:48:20,684 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:48:20,684 INFO L82 PathProgramCache]: Analyzing trace with hash -315300117, now seen corresponding path program 75 times [2018-09-26 21:48:20,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:48:20,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:48:20,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:20,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:48:20,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:48:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:48:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:21,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:48:21,866 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 [2018-09-26 21:48:21,872 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:48:22,032 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-26 21:48:22,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:48:22,037 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:48:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:48:22,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:48:22,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:48:22,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:48:22,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:48:22,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:48:22,535 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 80 states. Received shutdown request... [2018-09-26 21:48:28,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:48:28,376 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:48:28,381 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:48:28,382 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:48:28 BoogieIcfgContainer [2018-09-26 21:48:28,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:48:28,383 INFO L168 Benchmark]: Toolchain (without parser) took 239524.55 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -60.3 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 432.7 MB). Peak memory consumption was 372.4 MB. Max. memory is 7.1 GB. [2018-09-26 21:48:28,384 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:48:28,385 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:48:28,386 INFO L168 Benchmark]: Boogie Preprocessor took 21.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:48:28,386 INFO L168 Benchmark]: RCFGBuilder took 347.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:48:28,387 INFO L168 Benchmark]: TraceAbstraction took 239106.96 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -60.3 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 411.6 MB). Peak memory consumption was 351.3 MB. Max. memory is 7.1 GB. [2018-09-26 21:48:28,391 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 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 347.93 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 239106.96 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -60.3 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 411.6 MB). Peak memory consumption was 351.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 76). Cancelled while BasicCegarLoop was constructing difference of abstraction (200states) and FLOYD_HOARE automaton (currently 68 states, 80 states before enhancement), while ReachableStatesComputation was computing reachable states (249 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 239.0s OverallTime, 79 OverallIterations, 39 TraceHistogramMax, 167.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1861 SDtfs, 4503 SDslu, 33881 SDs, 0 SdLazy, 36597 SolverSat, 947 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11601 GetRequests, 8490 SyntacticMatches, 0 SemanticMatches, 3111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=200occurred in iteration=78, 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: 0.8s AutomataMinimizationTime, 78 MinimizatonAttempts, 158 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 61.2s InterpolantComputationTime, 15594 NumberOfCodeBlocks, 15594 NumberOfCodeBlocksAsserted, 907 NumberOfCheckSat, 15440 ConstructedInterpolants, 0 QuantifiedInterpolants, 5962304 SizeOfPredicates, 151 NumberOfNonLiveVariables, 24789 ConjunctsInSsa, 3151 ConjunctsInUnsatCore, 154 InterpolantComputations, 4 PerfectInterpolantSequences, 101612/191672 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/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-48-28-402.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-48-28-402.csv Completed graceful shutdown